Home / 715,021.96-986,738.34-392,739.52

Finding the Fourth Proportional to 715,021.96, 986,738.34 and 392,739.52

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Solution

The fourth proportional to 715,021.96, 986,738.34 and 392,739.52 is: 541,984.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,021.96 : 986,738.34 = 392,739.52 : x
  2. Step 2: Convert to fraction form
    715,021.96/986,738.34 = 392,739.52/x
  3. Step 3: Cross multiply
    715,021.96x = 986,738.34 × 392,739.52
  4. Step 4: Simplify right side
    715,021.96x = 387,531,142,017.20
  5. Step 5: Solve for x
    x = 387,531,142,017.20/715,021.96
  6. Step 6: Final answer
    x = 541,984.95

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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.