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Finding the Fourth Proportional to 642,373.44, 963,310.92 and 342,690.44

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Solution

The fourth proportional to 642,373.44, 963,310.92 and 342,690.44 is: 513,902.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,373.44 : 963,310.92 = 342,690.44 : x
  2. Step 2: Convert to fraction form
    642,373.44/963,310.92 = 342,690.44/x
  3. Step 3: Cross multiply
    642,373.44x = 963,310.92 × 342,690.44
  4. Step 4: Simplify right side
    642,373.44x = 330,117,443,031.61
  5. Step 5: Solve for x
    x = 330,117,443,031.61/642,373.44
  6. Step 6: Final answer
    x = 513,902.70

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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.