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Finding the Fourth Proportional to 361,863.20, 542,017.20 and 315,207.20

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Solution

The fourth proportional to 361,863.20, 542,017.20 and 315,207.20 is: 472,133.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,863.20 : 542,017.20 = 315,207.20 : x
  2. Step 2: Convert to fraction form
    361,863.20/542,017.20 = 315,207.20/x
  3. Step 3: Cross multiply
    361,863.20x = 542,017.20 × 315,207.20
  4. Step 4: Simplify right side
    361,863.20x = 170,847,723,963.84
  5. Step 5: Solve for x
    x = 170,847,723,963.84/361,863.20
  6. Step 6: Final answer
    x = 472,133.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.