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Finding the Fourth Proportional to 261,501.30, 391,267.80 and 172,927.80

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Solution

The fourth proportional to 261,501.30, 391,267.80 and 172,927.80 is: 258,740.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,501.30 : 391,267.80 = 172,927.80 : x
  2. Step 2: Convert to fraction form
    261,501.30/391,267.80 = 172,927.80/x
  3. Step 3: Cross multiply
    261,501.30x = 391,267.80 × 172,927.80
  4. Step 4: Simplify right side
    261,501.30x = 67,661,079,864.84
  5. Step 5: Solve for x
    x = 67,661,079,864.84/261,501.30
  6. Step 6: Final answer
    x = 258,740.89

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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.