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Finding the Fourth Proportional to 329,703.40, 495,138.30 and 255,005.20

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Solution

The fourth proportional to 329,703.40, 495,138.30 and 255,005.20 is: 382,958.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,703.40 : 495,138.30 = 255,005.20 : x
  2. Step 2: Convert to fraction form
    329,703.40/495,138.30 = 255,005.20/x
  3. Step 3: Cross multiply
    329,703.40x = 495,138.30 × 255,005.20
  4. Step 4: Simplify right side
    329,703.40x = 126,262,841,219.16
  5. Step 5: Solve for x
    x = 126,262,841,219.16/329,703.40
  6. Step 6: Final answer
    x = 382,958.87

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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.