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Finding the Fourth Proportional to 347,817.80, 521,726.70 and 137,347.40

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Solution

The fourth proportional to 347,817.80, 521,726.70 and 137,347.40 is: 206,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,817.80 : 521,726.70 = 137,347.40 : x
  2. Step 2: Convert to fraction form
    347,817.80/521,726.70 = 137,347.40/x
  3. Step 3: Cross multiply
    347,817.80x = 521,726.70 × 137,347.40
  4. Step 4: Simplify right side
    347,817.80x = 71,657,805,755.58
  5. Step 5: Solve for x
    x = 71,657,805,755.58/347,817.80
  6. Step 6: Final answer
    x = 206,021.10

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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.