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Finding the Fourth Proportional to 314,812.80, 472,334.40 and 127,843.20

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Solution

The fourth proportional to 314,812.80, 472,334.40 and 127,843.20 is: 191,811.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,812.80 : 472,334.40 = 127,843.20 : x
  2. Step 2: Convert to fraction form
    314,812.80/472,334.40 = 127,843.20/x
  3. Step 3: Cross multiply
    314,812.80x = 472,334.40 × 127,843.20
  4. Step 4: Simplify right side
    314,812.80x = 60,384,741,166.08
  5. Step 5: Solve for x
    x = 60,384,741,166.08/314,812.80
  6. Step 6: Final answer
    x = 191,811.58

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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.