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Finding the Fourth Proportional to 663,400.44, 915,492.87 and 376,920.90

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Solution

The fourth proportional to 663,400.44, 915,492.87 and 376,920.90 is: 520,150.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,400.44 : 915,492.87 = 376,920.90 : x
  2. Step 2: Convert to fraction form
    663,400.44/915,492.87 = 376,920.90/x
  3. Step 3: Cross multiply
    663,400.44x = 915,492.87 × 376,920.90
  4. Step 4: Simplify right side
    663,400.44x = 345,068,396,503.98
  5. Step 5: Solve for x
    x = 345,068,396,503.98/663,400.44
  6. Step 6: Final answer
    x = 520,150.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.