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Finding the Fourth Proportional to 862,560.86, 1,190,342.03 and 475,390.10

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Solution

The fourth proportional to 862,560.86, 1,190,342.03 and 475,390.10 is: 656,042.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,560.86 : 1,190,342.03 = 475,390.10 : x
  2. Step 2: Convert to fraction form
    862,560.86/1,190,342.03 = 475,390.10/x
  3. Step 3: Cross multiply
    862,560.86x = 1,190,342.03 × 475,390.10
  4. Step 4: Simplify right side
    862,560.86x = 565,876,817,274.81
  5. Step 5: Solve for x
    x = 565,876,817,274.81/862,560.86
  6. Step 6: Final answer
    x = 656,042.78

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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.