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Finding the Fourth Proportional to 391,258.92, 539,957.54 and 219,166.83

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Solution

The fourth proportional to 391,258.92, 539,957.54 and 219,166.83 is: 302,461.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,258.92 : 539,957.54 = 219,166.83 : x
  2. Step 2: Convert to fraction form
    391,258.92/539,957.54 = 219,166.83/x
  3. Step 3: Cross multiply
    391,258.92x = 539,957.54 × 219,166.83
  4. Step 4: Simplify right side
    391,258.92x = 118,340,782,376.40
  5. Step 5: Solve for x
    x = 118,340,782,376.40/391,258.92
  6. Step 6: Final answer
    x = 302,461.56

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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.