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Finding the Fourth Proportional to 399,330.49, 551,098.40 and 218,059.24

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Solution

The fourth proportional to 399,330.49, 551,098.40 and 218,059.24 is: 300,933.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,330.49 : 551,098.40 = 218,059.24 : x
  2. Step 2: Convert to fraction form
    399,330.49/551,098.40 = 218,059.24/x
  3. Step 3: Cross multiply
    399,330.49x = 551,098.40 × 218,059.24
  4. Step 4: Simplify right side
    399,330.49x = 120,172,098,269.22
  5. Step 5: Solve for x
    x = 120,172,098,269.22/399,330.49
  6. Step 6: Final answer
    x = 300,933.94

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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.