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Finding the Fourth Proportional to 266,009.30, 399,273.15 and 133,039.70

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Solution

The fourth proportional to 266,009.30, 399,273.15 and 133,039.70 is: 199,689.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,009.30 : 399,273.15 = 133,039.70 : x
  2. Step 2: Convert to fraction form
    266,009.30/399,273.15 = 133,039.70/x
  3. Step 3: Cross multiply
    266,009.30x = 399,273.15 × 133,039.70
  4. Step 4: Simplify right side
    266,009.30x = 53,119,180,094.06
  5. Step 5: Solve for x
    x = 53,119,180,094.06/266,009.30
  6. Step 6: Final answer
    x = 199,689.18

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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.