Home / 1,387,403.10-2,081,104.65-390,131.10

Finding the Fourth Proportional to 1,387,403.10, 2,081,104.65 and 390,131.10

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Solution

The fourth proportional to 1,387,403.10, 2,081,104.65 and 390,131.10 is: 585,196.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,403.10 : 2,081,104.65 = 390,131.10 : x
  2. Step 2: Convert to fraction form
    1,387,403.10/2,081,104.65 = 390,131.10/x
  3. Step 3: Cross multiply
    1,387,403.10x = 2,081,104.65 × 390,131.10
  4. Step 4: Simplify right side
    1,387,403.10x = 811,903,646,319.62
  5. Step 5: Solve for x
    x = 811,903,646,319.62/1,387,403.10
  6. Step 6: Final answer
    x = 585,196.65

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.