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Finding the Fourth Proportional to 518,074.52, 777,076.08 and 318,425.72

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Solution

The fourth proportional to 518,074.52, 777,076.08 and 318,425.72 is: 477,616.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,074.52 : 777,076.08 = 318,425.72 : x
  2. Step 2: Convert to fraction form
    518,074.52/777,076.08 = 318,425.72/x
  3. Step 3: Cross multiply
    518,074.52x = 777,076.08 × 318,425.72
  4. Step 4: Simplify right side
    518,074.52x = 247,441,010,268.78
  5. Step 5: Solve for x
    x = 247,441,010,268.78/518,074.52
  6. Step 6: Final answer
    x = 477,616.64

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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.