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Finding the Fourth Proportional to 315,291.20, 472,936.80 and 146,811.20

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Solution

The fourth proportional to 315,291.20, 472,936.80 and 146,811.20 is: 220,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,291.20 : 472,936.80 = 146,811.20 : x
  2. Step 2: Convert to fraction form
    315,291.20/472,936.80 = 146,811.20/x
  3. Step 3: Cross multiply
    315,291.20x = 472,936.80 × 146,811.20
  4. Step 4: Simplify right side
    315,291.20x = 69,432,419,132.16
  5. Step 5: Solve for x
    x = 69,432,419,132.16/315,291.20
  6. Step 6: Final answer
    x = 220,216.80

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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.