Home / 728,387.46-1,004,817.42-486,729.36

Finding the Fourth Proportional to 728,387.46, 1,004,817.42 and 486,729.36

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Solution

The fourth proportional to 728,387.46, 1,004,817.42 and 486,729.36 is: 671,447.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,387.46 : 1,004,817.42 = 486,729.36 : x
  2. Step 2: Convert to fraction form
    728,387.46/1,004,817.42 = 486,729.36/x
  3. Step 3: Cross multiply
    728,387.46x = 1,004,817.42 × 486,729.36
  4. Step 4: Simplify right side
    728,387.46x = 489,074,139,753.45
  5. Step 5: Solve for x
    x = 489,074,139,753.45/728,387.46
  6. Step 6: Final answer
    x = 671,447.78

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1.5x scale

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.