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Finding the Fourth Proportional to 458,512.80, 687,766.32 and 249,479.28

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Solution

The fourth proportional to 458,512.80, 687,766.32 and 249,479.28 is: 374,217.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,512.80 : 687,766.32 = 249,479.28 : x
  2. Step 2: Convert to fraction form
    458,512.80/687,766.32 = 249,479.28/x
  3. Step 3: Cross multiply
    458,512.80x = 687,766.32 × 249,479.28
  4. Step 4: Simplify right side
    458,512.80x = 171,583,446,321.85
  5. Step 5: Solve for x
    x = 171,583,446,321.85/458,512.80
  6. Step 6: Final answer
    x = 374,217.35

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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.