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Finding the Fourth Proportional to 261,391.70, 391,569.15 and 155,897.30

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Solution

The fourth proportional to 261,391.70, 391,569.15 and 155,897.30 is: 233,536.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,391.70 : 391,569.15 = 155,897.30 : x
  2. Step 2: Convert to fraction form
    261,391.70/391,569.15 = 155,897.30/x
  3. Step 3: Cross multiply
    261,391.70x = 391,569.15 × 155,897.30
  4. Step 4: Simplify right side
    261,391.70x = 61,044,573,248.30
  5. Step 5: Solve for x
    x = 61,044,573,248.30/261,391.70
  6. Step 6: Final answer
    x = 233,536.77

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1.5x scale

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.