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Finding the Fourth Proportional to 206,472.30, 309,708.45 and 153,984.30

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Solution

The fourth proportional to 206,472.30, 309,708.45 and 153,984.30 is: 230,976.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,472.30 : 309,708.45 = 153,984.30 : x
  2. Step 2: Convert to fraction form
    206,472.30/309,708.45 = 153,984.30/x
  3. Step 3: Cross multiply
    206,472.30x = 309,708.45 × 153,984.30
  4. Step 4: Simplify right side
    206,472.30x = 47,690,238,877.34
  5. Step 5: Solve for x
    x = 47,690,238,877.34/206,472.30
  6. Step 6: Final answer
    x = 230,976.45

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1.5x scale

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.