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Finding the Fourth Proportional to 458,210.60, 687,315.90 and 121,250.60

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Solution

The fourth proportional to 458,210.60, 687,315.90 and 121,250.60 is: 181,875.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,210.60 : 687,315.90 = 121,250.60 : x
  2. Step 2: Convert to fraction form
    458,210.60/687,315.90 = 121,250.60/x
  3. Step 3: Cross multiply
    458,210.60x = 687,315.90 × 121,250.60
  4. Step 4: Simplify right side
    458,210.60x = 83,337,465,264.54
  5. Step 5: Solve for x
    x = 83,337,465,264.54/458,210.60
  6. Step 6: Final answer
    x = 181,875.90

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Similar ratio
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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.