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Finding the Fourth Proportional to 916,728.48, 1,375,244.28 and 384,289.20

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Solution

The fourth proportional to 916,728.48, 1,375,244.28 and 384,289.20 is: 576,497.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,728.48 : 1,375,244.28 = 384,289.20 : x
  2. Step 2: Convert to fraction form
    916,728.48/1,375,244.28 = 384,289.20/x
  3. Step 3: Cross multiply
    916,728.48x = 1,375,244.28 × 384,289.20
  4. Step 4: Simplify right side
    916,728.48x = 528,491,524,165.78
  5. Step 5: Solve for x
    x = 528,491,524,165.78/916,728.48
  6. Step 6: Final answer
    x = 576,497.33

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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.