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Finding the Fourth Proportional to 347,681.80, 521,522.70 and 137,211.40

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Solution

The fourth proportional to 347,681.80, 521,522.70 and 137,211.40 is: 205,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,681.80 : 521,522.70 = 137,211.40 : x
  2. Step 2: Convert to fraction form
    347,681.80/521,522.70 = 137,211.40/x
  3. Step 3: Cross multiply
    347,681.80x = 521,522.70 × 137,211.40
  4. Step 4: Simplify right side
    347,681.80x = 71,558,859,798.78
  5. Step 5: Solve for x
    x = 71,558,859,798.78/347,681.80
  6. Step 6: Final answer
    x = 205,817.10

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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.