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Finding the Fourth Proportional to 663,438.24, 915,544.80 and 361,632.24

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Solution

The fourth proportional to 663,438.24, 915,544.80 and 361,632.24 is: 499,052.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,438.24 : 915,544.80 = 361,632.24 : x
  2. Step 2: Convert to fraction form
    663,438.24/915,544.80 = 361,632.24/x
  3. Step 3: Cross multiply
    663,438.24x = 915,544.80 × 361,632.24
  4. Step 4: Simplify right side
    663,438.24x = 331,090,516,844.35
  5. Step 5: Solve for x
    x = 331,090,516,844.35/663,438.24
  6. Step 6: Final answer
    x = 499,052.51

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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.