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Finding the Fourth Proportional to 283,812.80, 391,641.62 and 156,485.66

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Solution

The fourth proportional to 283,812.80, 391,641.62 and 156,485.66 is: 215,939.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,812.80 : 391,641.62 = 156,485.66 : x
  2. Step 2: Convert to fraction form
    283,812.80/391,641.62 = 156,485.66/x
  3. Step 3: Cross multiply
    283,812.80x = 391,641.62 × 156,485.66
  4. Step 4: Simplify right side
    283,812.80x = 61,286,294,648.53
  5. Step 5: Solve for x
    x = 61,286,294,648.53/283,812.80
  6. Step 6: Final answer
    x = 215,939.15

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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.