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Finding the Fourth Proportional to 389,171.16, 583,758.36 and 108,690.84

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Solution

The fourth proportional to 389,171.16, 583,758.36 and 108,690.84 is: 163,036.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,171.16 : 583,758.36 = 108,690.84 : x
  2. Step 2: Convert to fraction form
    389,171.16/583,758.36 = 108,690.84/x
  3. Step 3: Cross multiply
    389,171.16x = 583,758.36 × 108,690.84
  4. Step 4: Simplify right side
    389,171.16x = 63,449,186,505.42
  5. Step 5: Solve for x
    x = 63,449,186,505.42/389,171.16
  6. Step 6: Final answer
    x = 163,036.71

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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.