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Finding the Fourth Proportional to 663,128.44, 915,117.25 and 361,322.44

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Solution

The fourth proportional to 663,128.44, 915,117.25 and 361,322.44 is: 498,624.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,128.44 : 915,117.25 = 361,322.44 : x
  2. Step 2: Convert to fraction form
    663,128.44/915,117.25 = 361,322.44/x
  3. Step 3: Cross multiply
    663,128.44x = 915,117.25 × 361,322.44
  4. Step 4: Simplify right side
    663,128.44x = 330,652,397,656.09
  5. Step 5: Solve for x
    x = 330,652,397,656.09/663,128.44
  6. Step 6: Final answer
    x = 498,624.97

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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.