Home / 1,387,359.60-2,081,039.40-390,087.60

Finding the Fourth Proportional to 1,387,359.60, 2,081,039.40 and 390,087.60

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Solution

The fourth proportional to 1,387,359.60, 2,081,039.40 and 390,087.60 is: 585,131.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,359.60 : 2,081,039.40 = 390,087.60 : x
  2. Step 2: Convert to fraction form
    1,387,359.60/2,081,039.40 = 390,087.60/x
  3. Step 3: Cross multiply
    1,387,359.60x = 2,081,039.40 × 390,087.60
  4. Step 4: Simplify right side
    1,387,359.60x = 811,787,665,051.44
  5. Step 5: Solve for x
    x = 811,787,665,051.44/1,387,359.60
  6. Step 6: Final answer
    x = 585,131.40

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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.