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Finding the Fourth Proportional to 261,031.70, 391,029.15 and 155,537.30

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Solution

The fourth proportional to 261,031.70, 391,029.15 and 155,537.30 is: 232,997.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,031.70 : 391,029.15 = 155,537.30 : x
  2. Step 2: Convert to fraction form
    261,031.70/391,029.15 = 155,537.30/x
  3. Step 3: Cross multiply
    261,031.70x = 391,029.15 × 155,537.30
  4. Step 4: Simplify right side
    261,031.70x = 60,819,618,212.30
  5. Step 5: Solve for x
    x = 60,819,618,212.30/261,031.70
  6. Step 6: Final answer
    x = 232,997.06

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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.