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Finding the Fourth Proportional to 647,718.17, 972,419.18 and 498,063.55

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Solution

The fourth proportional to 647,718.17, 972,419.18 and 498,063.55 is: 747,742.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,718.17 : 972,419.18 = 498,063.55 : x
  2. Step 2: Convert to fraction form
    647,718.17/972,419.18 = 498,063.55/x
  3. Step 3: Cross multiply
    647,718.17x = 972,419.18 × 498,063.55
  4. Step 4: Simplify right side
    647,718.17x = 484,326,548,878.89
  5. Step 5: Solve for x
    x = 484,326,548,878.89/647,718.17
  6. Step 6: Final answer
    x = 747,742.72

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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.