Home / 715,042.20-986,765.36-388,361.60

Finding the Fourth Proportional to 715,042.20, 986,765.36 and 388,361.60

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Solution

The fourth proportional to 715,042.20, 986,765.36 and 388,361.60 is: 535,942.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,042.20 : 986,765.36 = 388,361.60 : x
  2. Step 2: Convert to fraction form
    715,042.20/986,765.36 = 388,361.60/x
  3. Step 3: Cross multiply
    715,042.20x = 986,765.36 × 388,361.60
  4. Step 4: Simplify right side
    715,042.20x = 383,221,767,158.54
  5. Step 5: Solve for x
    x = 383,221,767,158.54/715,042.20
  6. Step 6: Final answer
    x = 535,942.87

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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.