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Finding the Fourth Proportional to 266,442.30, 399,611.58 and 76,889.34

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Solution

The fourth proportional to 266,442.30, 399,611.58 and 76,889.34 is: 115,319.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,442.30 : 399,611.58 = 76,889.34 : x
  2. Step 2: Convert to fraction form
    266,442.30/399,611.58 = 76,889.34/x
  3. Step 3: Cross multiply
    266,442.30x = 399,611.58 × 76,889.34
  4. Step 4: Simplify right side
    266,442.30x = 30,725,870,642.56
  5. Step 5: Solve for x
    x = 30,725,870,642.56/266,442.30
  6. Step 6: Final answer
    x = 115,319.04

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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.