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Finding the Fourth Proportional to 318,488.78, 477,807 and 108,126.72

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Solution

The fourth proportional to 318,488.78, 477,807 and 108,126.72 is: 162,215.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,488.78 : 477,807 = 108,126.72 : x
  2. Step 2: Convert to fraction form
    318,488.78/477,807 = 108,126.72/x
  3. Step 3: Cross multiply
    318,488.78x = 477,807 × 108,126.72
  4. Step 4: Simplify right side
    318,488.78x = 51,663,703,703.04
  5. Step 5: Solve for x
    x = 51,663,703,703.04/318,488.78
  6. Step 6: Final answer
    x = 162,215.15

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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.