Home / 715,867.20-987,903.12-389,180.88

Finding the Fourth Proportional to 715,867.20, 987,903.12 and 389,180.88

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Solution

The fourth proportional to 715,867.20, 987,903.12 and 389,180.88 is: 537,073.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,867.20 : 987,903.12 = 389,180.88 : x
  2. Step 2: Convert to fraction form
    715,867.20/987,903.12 = 389,180.88/x
  3. Step 3: Cross multiply
    715,867.20x = 987,903.12 × 389,180.88
  4. Step 4: Simplify right side
    715,867.20x = 384,473,005,596.35
  5. Step 5: Solve for x
    x = 384,473,005,596.35/715,867.20
  6. Step 6: Final answer
    x = 537,073.09

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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.