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Finding the Fourth Proportional to 261,840.70, 391,853.85 and 156,735.10

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Solution

The fourth proportional to 261,840.70, 391,853.85 and 156,735.10 is: 234,559.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,840.70 : 391,853.85 = 156,735.10 : x
  2. Step 2: Convert to fraction form
    261,840.70/391,853.85 = 156,735.10/x
  3. Step 3: Cross multiply
    261,840.70x = 391,853.85 × 156,735.10
  4. Step 4: Simplify right side
    261,840.70x = 61,417,252,365.14
  5. Step 5: Solve for x
    x = 61,417,252,365.14/261,840.70
  6. Step 6: Final answer
    x = 234,559.61

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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.