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Finding the Fourth Proportional to 315,007.20, 472,208.40 and 104,536.80

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Solution

The fourth proportional to 315,007.20, 472,208.40 and 104,536.80 is: 156,704.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,007.20 : 472,208.40 = 104,536.80 : x
  2. Step 2: Convert to fraction form
    315,007.20/472,208.40 = 104,536.80/x
  3. Step 3: Cross multiply
    315,007.20x = 472,208.40 × 104,536.80
  4. Step 4: Simplify right side
    315,007.20x = 49,363,155,069.12
  5. Step 5: Solve for x
    x = 49,363,155,069.12/315,007.20
  6. Step 6: Final answer
    x = 156,704.85

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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.