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Finding the Fourth Proportional to 318,856.45, 477,720.72 and 299,891.11

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Solution

The fourth proportional to 318,856.45, 477,720.72 and 299,891.11 is: 449,306.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,856.45 : 477,720.72 = 299,891.11 : x
  2. Step 2: Convert to fraction form
    318,856.45/477,720.72 = 299,891.11/x
  3. Step 3: Cross multiply
    318,856.45x = 477,720.72 × 299,891.11
  4. Step 4: Simplify right side
    318,856.45x = 143,264,196,990.80
  5. Step 5: Solve for x
    x = 143,264,196,990.80/318,856.45
  6. Step 6: Final answer
    x = 449,306.25

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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.