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Finding the Fourth Proportional to 663,011.60, 994,517.40 and 438,625.40

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Solution

The fourth proportional to 663,011.60, 994,517.40 and 438,625.40 is: 657,938.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,011.60 : 994,517.40 = 438,625.40 : x
  2. Step 2: Convert to fraction form
    663,011.60/994,517.40 = 438,625.40/x
  3. Step 3: Cross multiply
    663,011.60x = 994,517.40 × 438,625.40
  4. Step 4: Simplify right side
    663,011.60x = 436,220,592,381.96
  5. Step 5: Solve for x
    x = 436,220,592,381.96/663,011.60
  6. Step 6: Final answer
    x = 657,938.10

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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.