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Finding the Fourth Proportional to 458,843.40, 688,265.10 and 143,332.20

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Solution

The fourth proportional to 458,843.40, 688,265.10 and 143,332.20 is: 214,998.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,843.40 : 688,265.10 = 143,332.20 : x
  2. Step 2: Convert to fraction form
    458,843.40/688,265.10 = 143,332.20/x
  3. Step 3: Cross multiply
    458,843.40x = 688,265.10 × 143,332.20
  4. Step 4: Simplify right side
    458,843.40x = 98,650,550,966.22
  5. Step 5: Solve for x
    x = 98,650,550,966.22/458,843.40
  6. Step 6: Final answer
    x = 214,998.30

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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.