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Finding the Fourth Proportional to 458,209.70, 687,487.35 and 221,761.70

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Solution

The fourth proportional to 458,209.70, 687,487.35 and 221,761.70 is: 332,726.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,209.70 : 687,487.35 = 221,761.70 : x
  2. Step 2: Convert to fraction form
    458,209.70/687,487.35 = 221,761.70/x
  3. Step 3: Cross multiply
    458,209.70x = 687,487.35 × 221,761.70
  4. Step 4: Simplify right side
    458,209.70x = 152,458,363,464.50
  5. Step 5: Solve for x
    x = 152,458,363,464.50/458,209.70
  6. Step 6: Final answer
    x = 332,726.18

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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.