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Finding the Fourth Proportional to 266,017.80, 397,874.70 and 238,139.40

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Solution

The fourth proportional to 266,017.80, 397,874.70 and 238,139.40 is: 356,177.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,017.80 : 397,874.70 = 238,139.40 : x
  2. Step 2: Convert to fraction form
    266,017.80/397,874.70 = 238,139.40/x
  3. Step 3: Cross multiply
    266,017.80x = 397,874.70 × 238,139.40
  4. Step 4: Simplify right side
    266,017.80x = 94,749,642,333.18
  5. Step 5: Solve for x
    x = 94,749,642,333.18/266,017.80
  6. Step 6: Final answer
    x = 356,177.83

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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.