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Finding the Fourth Proportional to 318,488.20, 477,732.32 and 81,830.86

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Solution

The fourth proportional to 318,488.20, 477,732.32 and 81,830.86 is: 122,746.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,488.20 : 477,732.32 = 81,830.86 : x
  2. Step 2: Convert to fraction form
    318,488.20/477,732.32 = 81,830.86/x
  3. Step 3: Cross multiply
    318,488.20x = 477,732.32 × 81,830.86
  4. Step 4: Simplify right side
    318,488.20x = 39,093,246,595.40
  5. Step 5: Solve for x
    x = 39,093,246,595.40/318,488.20
  6. Step 6: Final answer
    x = 122,746.30

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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.