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Finding the Fourth Proportional to 640,156.53, 960,439.92 and 448,230.87

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Solution

The fourth proportional to 640,156.53, 960,439.92 and 448,230.87 is: 672,489.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,156.53 : 960,439.92 = 448,230.87 : x
  2. Step 2: Convert to fraction form
    640,156.53/960,439.92 = 448,230.87/x
  3. Step 3: Cross multiply
    640,156.53x = 960,439.92 × 448,230.87
  4. Step 4: Simplify right side
    640,156.53x = 430,498,820,924.33
  5. Step 5: Solve for x
    x = 430,498,820,924.33/640,156.53
  6. Step 6: Final answer
    x = 672,489.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.