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Finding the Fourth Proportional to 266,011.20, 399,211.20 and 187,279.20

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Solution

The fourth proportional to 266,011.20, 399,211.20 and 187,279.20 is: 281,055.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,011.20 : 399,211.20 = 187,279.20 : x
  2. Step 2: Convert to fraction form
    266,011.20/399,211.20 = 187,279.20/x
  3. Step 3: Cross multiply
    266,011.20x = 399,211.20 × 187,279.20
  4. Step 4: Simplify right side
    266,011.20x = 74,763,954,167.04
  5. Step 5: Solve for x
    x = 74,763,954,167.04/266,011.20
  6. Step 6: Final answer
    x = 281,055.66

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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.