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Finding the Fourth Proportional to 266,612.20, 399,140.70 and 238,618.60

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Solution

The fourth proportional to 266,612.20, 399,140.70 and 238,618.60 is: 357,231.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,612.20 : 399,140.70 = 238,618.60 : x
  2. Step 2: Convert to fraction form
    266,612.20/399,140.70 = 238,618.60/x
  3. Step 3: Cross multiply
    266,612.20x = 399,140.70 × 238,618.60
  4. Step 4: Simplify right side
    266,612.20x = 95,242,395,037.02
  5. Step 5: Solve for x
    x = 95,242,395,037.02/266,612.20
  6. Step 6: Final answer
    x = 357,231.95

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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.