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Finding the Fourth Proportional to 640,157.53, 960,441.42 and 448,231.87

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Solution

The fourth proportional to 640,157.53, 960,441.42 and 448,231.87 is: 672,491.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,157.53 : 960,441.42 = 448,231.87 : x
  2. Step 2: Convert to fraction form
    640,157.53/960,441.42 = 448,231.87/x
  3. Step 3: Cross multiply
    640,157.53x = 960,441.42 × 448,231.87
  4. Step 4: Simplify right side
    640,157.53x = 430,500,453,712.06
  5. Step 5: Solve for x
    x = 430,500,453,712.06/640,157.53
  6. Step 6: Final answer
    x = 672,491.43

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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.