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Finding the Fourth Proportional to 261,026.70, 391,021.65 and 155,532.30

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Solution

The fourth proportional to 261,026.70, 391,021.65 and 155,532.30 is: 232,989.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,026.70 : 391,021.65 = 155,532.30 : x
  2. Step 2: Convert to fraction form
    261,026.70/391,021.65 = 155,532.30/x
  3. Step 3: Cross multiply
    261,026.70x = 391,021.65 × 155,532.30
  4. Step 4: Simplify right side
    261,026.70x = 60,816,496,574.30
  5. Step 5: Solve for x
    x = 60,816,496,574.30/261,026.70
  6. Step 6: Final answer
    x = 232,989.56

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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.