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Finding the Fourth Proportional to 715,219.56, 986,998.86 and 392,922.72

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Solution

The fourth proportional to 715,219.56, 986,998.86 and 392,922.72 is: 542,231.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,219.56 : 986,998.86 = 392,922.72 : x
  2. Step 2: Convert to fraction form
    715,219.56/986,998.86 = 392,922.72/x
  3. Step 3: Cross multiply
    715,219.56x = 986,998.86 × 392,922.72
  4. Step 4: Simplify right side
    715,219.56x = 387,814,276,708.10
  5. Step 5: Solve for x
    x = 387,814,276,708.10/715,219.56
  6. Step 6: Final answer
    x = 542,231.08

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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.