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Finding the Fourth Proportional to 318,699.90, 478,049.85 and 219,167.10

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Solution

The fourth proportional to 318,699.90, 478,049.85 and 219,167.10 is: 328,750.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,699.90 : 478,049.85 = 219,167.10 : x
  2. Step 2: Convert to fraction form
    318,699.90/478,049.85 = 219,167.10/x
  3. Step 3: Cross multiply
    318,699.90x = 478,049.85 × 219,167.10
  4. Step 4: Simplify right side
    318,699.90x = 104,772,799,279.94
  5. Step 5: Solve for x
    x = 104,772,799,279.94/318,699.90
  6. Step 6: Final answer
    x = 328,750.65

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Similar ratio
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1.5x scale

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.