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Finding the Fourth Proportional to 427,445.64, 641,901.98 and 379,522.55

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Solution

The fourth proportional to 427,445.64, 641,901.98 and 379,522.55 is: 569,935.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,445.64 : 641,901.98 = 379,522.55 : x
  2. Step 2: Convert to fraction form
    427,445.64/641,901.98 = 379,522.55/x
  3. Step 3: Cross multiply
    427,445.64x = 641,901.98 × 379,522.55
  4. Step 4: Simplify right side
    427,445.64x = 243,616,278,853.21
  5. Step 5: Solve for x
    x = 243,616,278,853.21/427,445.64
  6. Step 6: Final answer
    x = 569,935.11

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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.