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Finding the Fourth Proportional to 347,434.60, 521,324.70 and 137,079.40

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Solution

The fourth proportional to 347,434.60, 521,324.70 and 137,079.40 is: 205,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,434.60 : 521,324.70 = 137,079.40 : x
  2. Step 2: Convert to fraction form
    347,434.60/521,324.70 = 137,079.40/x
  3. Step 3: Cross multiply
    347,434.60x = 521,324.70 × 137,079.40
  4. Step 4: Simplify right side
    347,434.60x = 71,462,877,081.18
  5. Step 5: Solve for x
    x = 71,462,877,081.18/347,434.60
  6. Step 6: Final answer
    x = 205,687.28

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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.