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Finding the Fourth Proportional to 314,908.40, 472,366.20 and 78,251.60

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Solution

The fourth proportional to 314,908.40, 472,366.20 and 78,251.60 is: 117,378.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,908.40 : 472,366.20 = 78,251.60 : x
  2. Step 2: Convert to fraction form
    314,908.40/472,366.20 = 78,251.60/x
  3. Step 3: Cross multiply
    314,908.40x = 472,366.20 × 78,251.60
  4. Step 4: Simplify right side
    314,908.40x = 36,963,410,935.92
  5. Step 5: Solve for x
    x = 36,963,410,935.92/314,908.40
  6. Step 6: Final answer
    x = 117,378.29

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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.