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Finding the Fourth Proportional to 399,015.20, 550,654.24 and 217,737.07

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Solution

The fourth proportional to 399,015.20, 550,654.24 and 217,737.07 is: 300,484.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,015.20 : 550,654.24 = 217,737.07 : x
  2. Step 2: Convert to fraction form
    399,015.20/550,654.24 = 217,737.07/x
  3. Step 3: Cross multiply
    399,015.20x = 550,654.24 × 217,737.07
  4. Step 4: Simplify right side
    399,015.20x = 119,897,838,047.41
  5. Step 5: Solve for x
    x = 119,897,838,047.41/399,015.20
  6. Step 6: Final answer
    x = 300,484.39

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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.