Home / 712,286.08-982,917.12-389,934.40

Finding the Fourth Proportional to 712,286.08, 982,917.12 and 389,934.40

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Solution

The fourth proportional to 712,286.08, 982,917.12 and 389,934.40 is: 538,088.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,286.08 : 982,917.12 = 389,934.40 : x
  2. Step 2: Convert to fraction form
    712,286.08/982,917.12 = 389,934.40/x
  3. Step 3: Cross multiply
    712,286.08x = 982,917.12 × 389,934.40
  4. Step 4: Simplify right side
    712,286.08x = 383,273,197,436.93
  5. Step 5: Solve for x
    x = 383,273,197,436.93/712,286.08
  6. Step 6: Final answer
    x = 538,088.85

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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.