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Finding the Fourth Proportional to 330,651.81, 495,966.78 and 143,663.31

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Solution

The fourth proportional to 330,651.81, 495,966.78 and 143,663.31 is: 215,490.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,651.81 : 495,966.78 = 143,663.31 : x
  2. Step 2: Convert to fraction form
    330,651.81/495,966.78 = 143,663.31/x
  3. Step 3: Cross multiply
    330,651.81x = 495,966.78 × 143,663.31
  4. Step 4: Simplify right side
    330,651.81x = 71,252,229,264.84
  5. Step 5: Solve for x
    x = 71,252,229,264.84/330,651.81
  6. Step 6: Final answer
    x = 215,490.21

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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.