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Finding the Fourth Proportional to 208,251.40, 312,304.20 and 108,378.40

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Solution

The fourth proportional to 208,251.40, 312,304.20 and 108,378.40 is: 162,529.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,251.40 : 312,304.20 = 108,378.40 : x
  2. Step 2: Convert to fraction form
    208,251.40/312,304.20 = 108,378.40/x
  3. Step 3: Cross multiply
    208,251.40x = 312,304.20 × 108,378.40
  4. Step 4: Simplify right side
    208,251.40x = 33,847,029,509.28
  5. Step 5: Solve for x
    x = 33,847,029,509.28/208,251.40
  6. Step 6: Final answer
    x = 162,529.66

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1.5x scale

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.