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Finding the Fourth Proportional to 399,710.03, 551,598.73 and 218,423.12

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Solution

The fourth proportional to 399,710.03, 551,598.73 and 218,423.12 is: 301,423.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,710.03 : 551,598.73 = 218,423.12 : x
  2. Step 2: Convert to fraction form
    399,710.03/551,598.73 = 218,423.12/x
  3. Step 3: Cross multiply
    399,710.03x = 551,598.73 × 218,423.12
  4. Step 4: Simplify right side
    399,710.03x = 120,481,912,290.59
  5. Step 5: Solve for x
    x = 120,481,912,290.59/399,710.03
  6. Step 6: Final answer
    x = 301,423.29

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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.