Home / 458,386.20-687,644.10-142,810.20

Finding the Fourth Proportional to 458,386.20, 687,644.10 and 142,810.20

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Solution

The fourth proportional to 458,386.20, 687,644.10 and 142,810.20 is: 214,235.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,386.20 : 687,644.10 = 142,810.20 : x
  2. Step 2: Convert to fraction form
    458,386.20/687,644.10 = 142,810.20/x
  3. Step 3: Cross multiply
    458,386.20x = 687,644.10 × 142,810.20
  4. Step 4: Simplify right side
    458,386.20x = 98,202,591,449.82
  5. Step 5: Solve for x
    x = 98,202,591,449.82/458,386.20
  6. Step 6: Final answer
    x = 214,235.49

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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.