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Finding the Fourth Proportional to 458,220.60, 687,330.90 and 121,260.60

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Solution

The fourth proportional to 458,220.60, 687,330.90 and 121,260.60 is: 181,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,220.60 : 687,330.90 = 121,260.60 : x
  2. Step 2: Convert to fraction form
    458,220.60/687,330.90 = 121,260.60/x
  3. Step 3: Cross multiply
    458,220.60x = 687,330.90 × 121,260.60
  4. Step 4: Simplify right side
    458,220.60x = 83,346,157,332.54
  5. Step 5: Solve for x
    x = 83,346,157,332.54/458,220.60
  6. Step 6: Final answer
    x = 181,890.90

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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.