Home / 398,917.12-552,834.58-391,347.40

Finding the Fourth Proportional to 398,917.12, 552,834.58 and 391,347.40

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Solution

The fourth proportional to 398,917.12, 552,834.58 and 391,347.40 is: 542,344.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,917.12 : 552,834.58 = 391,347.40 : x
  2. Step 2: Convert to fraction form
    398,917.12/552,834.58 = 391,347.40/x
  3. Step 3: Cross multiply
    398,917.12x = 552,834.58 × 391,347.40
  4. Step 4: Simplify right side
    398,917.12x = 216,350,375,513.09
  5. Step 5: Solve for x
    x = 216,350,375,513.09/398,917.12
  6. Step 6: Final answer
    x = 542,344.17

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.