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Finding the Fourth Proportional to 541,721.40, 812,711.70 and 261,007.80

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Solution

The fourth proportional to 541,721.40, 812,711.70 and 261,007.80 is: 391,574.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,721.40 : 812,711.70 = 261,007.80 : x
  2. Step 2: Convert to fraction form
    541,721.40/812,711.70 = 261,007.80/x
  3. Step 3: Cross multiply
    541,721.40x = 812,711.70 × 261,007.80
  4. Step 4: Simplify right side
    541,721.40x = 212,124,092,851.26
  5. Step 5: Solve for x
    x = 212,124,092,851.26/541,721.40
  6. Step 6: Final answer
    x = 391,574.14

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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.