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Finding the Fourth Proportional to 318,482.28, 439,358.58 and 205,341.48

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Solution

The fourth proportional to 318,482.28, 439,358.58 and 205,341.48 is: 283,276.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,482.28 : 439,358.58 = 205,341.48 : x
  2. Step 2: Convert to fraction form
    318,482.28/439,358.58 = 205,341.48/x
  3. Step 3: Cross multiply
    318,482.28x = 439,358.58 × 205,341.48
  4. Step 4: Simplify right side
    318,482.28x = 90,218,541,067.90
  5. Step 5: Solve for x
    x = 90,218,541,067.90/318,482.28
  6. Step 6: Final answer
    x = 283,276.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.