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Finding the Fourth Proportional to 656,879.40, 905,254.92 and 475,283.88

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Solution

The fourth proportional to 656,879.40, 905,254.92 and 475,283.88 is: 654,995.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,879.40 : 905,254.92 = 475,283.88 : x
  2. Step 2: Convert to fraction form
    656,879.40/905,254.92 = 475,283.88/x
  3. Step 3: Cross multiply
    656,879.40x = 905,254.92 × 475,283.88
  4. Step 4: Simplify right side
    656,879.40x = 430,253,070,766.69
  5. Step 5: Solve for x
    x = 430,253,070,766.69/656,879.40
  6. Step 6: Final answer
    x = 654,995.53

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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.