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Finding the Fourth Proportional to 399,332.04, 551,073.96 and 218,043.40

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Solution

The fourth proportional to 399,332.04, 551,073.96 and 218,043.40 is: 300,897.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,332.04 : 551,073.96 = 218,043.40 : x
  2. Step 2: Convert to fraction form
    399,332.04/551,073.96 = 218,043.40/x
  3. Step 3: Cross multiply
    399,332.04x = 551,073.96 × 218,043.40
  4. Step 4: Simplify right side
    399,332.04x = 120,158,039,889.86
  5. Step 5: Solve for x
    x = 120,158,039,889.86/399,332.04
  6. Step 6: Final answer
    x = 300,897.57

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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.