Home / 715,022.46-986,739.03-392,740.02

Finding the Fourth Proportional to 715,022.46, 986,739.03 and 392,740.02

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Solution

The fourth proportional to 715,022.46, 986,739.03 and 392,740.02 is: 541,985.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,022.46 : 986,739.03 = 392,740.02 : x
  2. Step 2: Convert to fraction form
    715,022.46/986,739.03 = 392,740.02/x
  3. Step 3: Cross multiply
    715,022.46x = 986,739.03 × 392,740.02
  4. Step 4: Simplify right side
    715,022.46x = 387,531,906,376.98
  5. Step 5: Solve for x
    x = 387,531,906,376.98/715,022.46
  6. Step 6: Final answer
    x = 541,985.64

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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.