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Finding the Fourth Proportional to 663,458.84, 915,568.40 and 376,978.92

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Solution

The fourth proportional to 663,458.84, 915,568.40 and 376,978.92 is: 520,228.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,458.84 : 915,568.40 = 376,978.92 : x
  2. Step 2: Convert to fraction form
    663,458.84/915,568.40 = 376,978.92/x
  3. Step 3: Cross multiply
    663,458.84x = 915,568.40 × 376,978.92
  4. Step 4: Simplify right side
    663,458.84x = 345,149,984,733.23
  5. Step 5: Solve for x
    x = 345,149,984,733.23/663,458.84
  6. Step 6: Final answer
    x = 520,228.18

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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.