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Finding the Fourth Proportional to 312,355.56, 431,050.92 and 169,115.70

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Solution

The fourth proportional to 312,355.56, 431,050.92 and 169,115.70 is: 233,379.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,355.56 : 431,050.92 = 169,115.70 : x
  2. Step 2: Convert to fraction form
    312,355.56/431,050.92 = 169,115.70/x
  3. Step 3: Cross multiply
    312,355.56x = 431,050.92 × 169,115.70
  4. Step 4: Simplify right side
    312,355.56x = 72,897,478,071.44
  5. Step 5: Solve for x
    x = 72,897,478,071.44/312,355.56
  6. Step 6: Final answer
    x = 233,379.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.