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Finding the Fourth Proportional to 489,420.47, 675,404.86 and 274,565.15

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Solution

The fourth proportional to 489,420.47, 675,404.86 and 274,565.15 is: 378,902.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,420.47 : 675,404.86 = 274,565.15 : x
  2. Step 2: Convert to fraction form
    489,420.47/675,404.86 = 274,565.15/x
  3. Step 3: Cross multiply
    489,420.47x = 675,404.86 × 274,565.15
  4. Step 4: Simplify right side
    489,420.47x = 185,442,636,195.58
  5. Step 5: Solve for x
    x = 185,442,636,195.58/489,420.47
  6. Step 6: Final answer
    x = 378,902.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.