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Finding the Fourth Proportional to 266,298.08, 399,425.20 and 79,309.60

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Solution

The fourth proportional to 266,298.08, 399,425.20 and 79,309.60 is: 118,957.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,298.08 : 399,425.20 = 79,309.60 : x
  2. Step 2: Convert to fraction form
    266,298.08/399,425.20 = 79,309.60/x
  3. Step 3: Cross multiply
    266,298.08x = 399,425.20 × 79,309.60
  4. Step 4: Simplify right side
    266,298.08x = 31,678,252,841.92
  5. Step 5: Solve for x
    x = 31,678,252,841.92/266,298.08
  6. Step 6: Final answer
    x = 118,957.87

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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.