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Finding the Fourth Proportional to 315,066.80, 472,600.20 and 115,320.80

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Solution

The fourth proportional to 315,066.80, 472,600.20 and 115,320.80 is: 172,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,066.80 : 472,600.20 = 115,320.80 : x
  2. Step 2: Convert to fraction form
    315,066.80/472,600.20 = 115,320.80/x
  3. Step 3: Cross multiply
    315,066.80x = 472,600.20 × 115,320.80
  4. Step 4: Simplify right side
    315,066.80x = 54,500,633,144.16
  5. Step 5: Solve for x
    x = 54,500,633,144.16/315,066.80
  6. Step 6: Final answer
    x = 172,981.20

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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.