Home / 715,139.62-986,480.06-428,493.60

Finding the Fourth Proportional to 715,139.62, 986,480.06 and 428,493.60

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Solution

The fourth proportional to 715,139.62, 986,480.06 and 428,493.60 is: 591,073.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,139.62 : 986,480.06 = 428,493.60 : x
  2. Step 2: Convert to fraction form
    715,139.62/986,480.06 = 428,493.60/x
  3. Step 3: Cross multiply
    715,139.62x = 986,480.06 × 428,493.60
  4. Step 4: Simplify right side
    715,139.62x = 422,700,390,095.15
  5. Step 5: Solve for x
    x = 422,700,390,095.15/715,139.62
  6. Step 6: Final answer
    x = 591,073.94

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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.