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Finding the Fourth Proportional to 393,051.70, 542,344.92 and 220,946.76

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Solution

The fourth proportional to 393,051.70, 542,344.92 and 220,946.76 is: 304,869.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,051.70 : 542,344.92 = 220,946.76 : x
  2. Step 2: Convert to fraction form
    393,051.70/542,344.92 = 220,946.76/x
  3. Step 3: Cross multiply
    393,051.70x = 542,344.92 × 220,946.76
  4. Step 4: Simplify right side
    393,051.70x = 119,829,352,876.46
  5. Step 5: Solve for x
    x = 119,829,352,876.46/393,051.70
  6. Step 6: Final answer
    x = 304,869.19

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1.5x scale

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.