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Finding the Fourth Proportional to 285,337.08, 393,765.31 and 156,283.69

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Solution

The fourth proportional to 285,337.08, 393,765.31 and 156,283.69 is: 215,671.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,337.08 : 393,765.31 = 156,283.69 : x
  2. Step 2: Convert to fraction form
    285,337.08/393,765.31 = 156,283.69/x
  3. Step 3: Cross multiply
    285,337.08x = 393,765.31 × 156,283.69
  4. Step 4: Simplify right side
    285,337.08x = 61,539,093,603.48
  5. Step 5: Solve for x
    x = 61,539,093,603.48/285,337.08
  6. Step 6: Final answer
    x = 215,671.56

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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.