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Finding the Fourth Proportional to 663,678.56, 915,877.33 and 361,872.56

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Solution

The fourth proportional to 663,678.56, 915,877.33 and 361,872.56 is: 499,384.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,678.56 : 915,877.33 = 361,872.56 : x
  2. Step 2: Convert to fraction form
    663,678.56/915,877.33 = 361,872.56/x
  3. Step 3: Cross multiply
    663,678.56x = 915,877.33 × 361,872.56
  4. Step 4: Simplify right side
    663,678.56x = 331,430,875,438.08
  5. Step 5: Solve for x
    x = 331,430,875,438.08/663,678.56
  6. Step 6: Final answer
    x = 499,384.63

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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.