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Finding the Fourth Proportional to 518,371.32, 775,800.72 and 318,818.28

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Solution

The fourth proportional to 518,371.32, 775,800.72 and 318,818.28 is: 477,147.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,371.32 : 775,800.72 = 318,818.28 : x
  2. Step 2: Convert to fraction form
    518,371.32/775,800.72 = 318,818.28/x
  3. Step 3: Cross multiply
    518,371.32x = 775,800.72 × 318,818.28
  4. Step 4: Simplify right side
    518,371.32x = 247,339,451,173.16
  5. Step 5: Solve for x
    x = 247,339,451,173.16/518,371.32
  6. Step 6: Final answer
    x = 477,147.25

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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.