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Finding the Fourth Proportional to 315,480.57, 473,288.90 and 90,839.49

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Solution

The fourth proportional to 315,480.57, 473,288.90 and 90,839.49 is: 136,278.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,480.57 : 473,288.90 = 90,839.49 : x
  2. Step 2: Convert to fraction form
    315,480.57/473,288.90 = 90,839.49/x
  3. Step 3: Cross multiply
    315,480.57x = 473,288.90 × 90,839.49
  4. Step 4: Simplify right side
    315,480.57x = 42,993,321,844.46
  5. Step 5: Solve for x
    x = 42,993,321,844.46/315,480.57
  6. Step 6: Final answer
    x = 136,278.83

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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.