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Finding the Fourth Proportional to 268,857.40, 403,286.10 and 185,913.40

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Solution

The fourth proportional to 268,857.40, 403,286.10 and 185,913.40 is: 278,870.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,857.40 : 403,286.10 = 185,913.40 : x
  2. Step 2: Convert to fraction form
    268,857.40/403,286.10 = 185,913.40/x
  3. Step 3: Cross multiply
    268,857.40x = 403,286.10 × 185,913.40
  4. Step 4: Simplify right side
    268,857.40x = 74,976,290,023.74
  5. Step 5: Solve for x
    x = 74,976,290,023.74/268,857.40
  6. Step 6: Final answer
    x = 278,870.10

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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.