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Finding the Fourth Proportional to 205,712.40, 308,568.60 and 149,287.80

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Solution

The fourth proportional to 205,712.40, 308,568.60 and 149,287.80 is: 223,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,712.40 : 308,568.60 = 149,287.80 : x
  2. Step 2: Convert to fraction form
    205,712.40/308,568.60 = 149,287.80/x
  3. Step 3: Cross multiply
    205,712.40x = 308,568.60 × 149,287.80
  4. Step 4: Simplify right side
    205,712.40x = 46,065,527,443.08
  5. Step 5: Solve for x
    x = 46,065,527,443.08/205,712.40
  6. Step 6: Final answer
    x = 223,931.70

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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.