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Finding the Fourth Proportional to 664,142.79, 916,509.43 and 373,753.24

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Solution

The fourth proportional to 664,142.79, 916,509.43 and 373,753.24 is: 515,775.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,142.79 : 916,509.43 = 373,753.24 : x
  2. Step 2: Convert to fraction form
    664,142.79/916,509.43 = 373,753.24/x
  3. Step 3: Cross multiply
    664,142.79x = 916,509.43 × 373,753.24
  4. Step 4: Simplify right side
    664,142.79x = 342,548,367,128.97
  5. Step 5: Solve for x
    x = 342,548,367,128.97/664,142.79
  6. Step 6: Final answer
    x = 515,775.18

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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.