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Finding the Fourth Proportional to 266,059.80, 399,089.70 and 218,820.60

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Solution

The fourth proportional to 266,059.80, 399,089.70 and 218,820.60 is: 328,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,059.80 : 399,089.70 = 218,820.60 : x
  2. Step 2: Convert to fraction form
    266,059.80/399,089.70 = 218,820.60/x
  3. Step 3: Cross multiply
    266,059.80x = 399,089.70 × 218,820.60
  4. Step 4: Simplify right side
    266,059.80x = 87,329,047,607.82
  5. Step 5: Solve for x
    x = 87,329,047,607.82/266,059.80
  6. Step 6: Final answer
    x = 328,230.90

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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.