Home / 638,138.10-957,207.15-559,406.10

Finding the Fourth Proportional to 638,138.10, 957,207.15 and 559,406.10

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Solution

The fourth proportional to 638,138.10, 957,207.15 and 559,406.10 is: 839,109.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,138.10 : 957,207.15 = 559,406.10 : x
  2. Step 2: Convert to fraction form
    638,138.10/957,207.15 = 559,406.10/x
  3. Step 3: Cross multiply
    638,138.10x = 957,207.15 × 559,406.10
  4. Step 4: Simplify right side
    638,138.10x = 535,467,518,673.62
  5. Step 5: Solve for x
    x = 535,467,518,673.62/638,138.10
  6. Step 6: Final answer
    x = 839,109.15

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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.