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Finding the Fourth Proportional to 663,364.35, 915,443.10 and 376,884.90

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Solution

The fourth proportional to 663,364.35, 915,443.10 and 376,884.90 is: 520,101.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,364.35 : 915,443.10 = 376,884.90 : x
  2. Step 2: Convert to fraction form
    663,364.35/915,443.10 = 376,884.90/x
  3. Step 3: Cross multiply
    663,364.35x = 915,443.10 × 376,884.90
  4. Step 4: Simplify right side
    663,364.35x = 345,016,681,199.19
  5. Step 5: Solve for x
    x = 345,016,681,199.19/663,364.35
  6. Step 6: Final answer
    x = 520,101.33

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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.