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Finding the Fourth Proportional to 438,667.80, 658,001.70 and 431,669.40

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Solution

The fourth proportional to 438,667.80, 658,001.70 and 431,669.40 is: 647,504.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,667.80 : 658,001.70 = 431,669.40 : x
  2. Step 2: Convert to fraction form
    438,667.80/658,001.70 = 431,669.40/x
  3. Step 3: Cross multiply
    438,667.80x = 658,001.70 × 431,669.40
  4. Step 4: Simplify right side
    438,667.80x = 284,039,199,037.98
  5. Step 5: Solve for x
    x = 284,039,199,037.98/438,667.80
  6. Step 6: Final answer
    x = 647,504.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.