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Finding the Fourth Proportional to 663,368.85, 915,449.31 and 376,889.40

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Solution

The fourth proportional to 663,368.85, 915,449.31 and 376,889.40 is: 520,107.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,368.85 : 915,449.31 = 376,889.40 : x
  2. Step 2: Convert to fraction form
    663,368.85/915,449.31 = 376,889.40/x
  3. Step 3: Cross multiply
    663,368.85x = 915,449.31 × 376,889.40
  4. Step 4: Simplify right side
    663,368.85x = 345,023,141,176.31
  5. Step 5: Solve for x
    x = 345,023,141,176.31/663,368.85
  6. Step 6: Final answer
    x = 520,107.54

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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.