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Finding the Fourth Proportional to 266,543.20, 399,620.40 and 108,690.40

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Solution

The fourth proportional to 266,543.20, 399,620.40 and 108,690.40 is: 162,956.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,543.20 : 399,620.40 = 108,690.40 : x
  2. Step 2: Convert to fraction form
    266,543.20/399,620.40 = 108,690.40/x
  3. Step 3: Cross multiply
    266,543.20x = 399,620.40 × 108,690.40
  4. Step 4: Simplify right side
    266,543.20x = 43,434,901,124.16
  5. Step 5: Solve for x
    x = 43,434,901,124.16/266,543.20
  6. Step 6: Final answer
    x = 162,956.33

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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.