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Finding the Fourth Proportional to 663,415.44, 915,513.57 and 376,935.90

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Solution

The fourth proportional to 663,415.44, 915,513.57 and 376,935.90 is: 520,171.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,415.44 : 915,513.57 = 376,935.90 : x
  2. Step 2: Convert to fraction form
    663,415.44/915,513.57 = 376,935.90/x
  3. Step 3: Cross multiply
    663,415.44x = 915,513.57 × 376,935.90
  4. Step 4: Simplify right side
    663,415.44x = 345,089,931,470.16
  5. Step 5: Solve for x
    x = 345,089,931,470.16/663,415.44
  6. Step 6: Final answer
    x = 520,171.69

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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.