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Finding the Fourth Proportional to 458,016.68, 687,420.30 and 317,873.72

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Solution

The fourth proportional to 458,016.68, 687,420.30 and 317,873.72 is: 477,084.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,016.68 : 687,420.30 = 317,873.72 : x
  2. Step 2: Convert to fraction form
    458,016.68/687,420.30 = 317,873.72/x
  3. Step 3: Cross multiply
    458,016.68x = 687,420.30 × 317,873.72
  4. Step 4: Simplify right side
    458,016.68x = 218,512,850,875.09
  5. Step 5: Solve for x
    x = 218,512,850,875.09/458,016.68
  6. Step 6: Final answer
    x = 477,084.92

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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.