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Finding the Fourth Proportional to 497,974.40, 746,961.60 and 478,620.80

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Solution

The fourth proportional to 497,974.40, 746,961.60 and 478,620.80 is: 717,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,974.40 : 746,961.60 = 478,620.80 : x
  2. Step 2: Convert to fraction form
    497,974.40/746,961.60 = 478,620.80/x
  3. Step 3: Cross multiply
    497,974.40x = 746,961.60 × 478,620.80
  4. Step 4: Simplify right side
    497,974.40x = 357,511,358,561.28
  5. Step 5: Solve for x
    x = 357,511,358,561.28/497,974.40
  6. Step 6: Final answer
    x = 717,931.20

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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.