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Finding the Fourth Proportional to 266,009.80, 399,273.90 and 133,040.20

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Solution

The fourth proportional to 266,009.80, 399,273.90 and 133,040.20 is: 199,689.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,009.80 : 399,273.90 = 133,040.20 : x
  2. Step 2: Convert to fraction form
    266,009.80/399,273.90 = 133,040.20/x
  3. Step 3: Cross multiply
    266,009.80x = 399,273.90 × 133,040.20
  4. Step 4: Simplify right side
    266,009.80x = 53,119,479,510.78
  5. Step 5: Solve for x
    x = 53,119,479,510.78/266,009.80
  6. Step 6: Final answer
    x = 199,689.93

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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.