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Finding the Fourth Proportional to 278,644.38, 384,525.84 and 151,320.88

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Solution

The fourth proportional to 278,644.38, 384,525.84 and 151,320.88 is: 208,820.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,644.38 : 384,525.84 = 151,320.88 : x
  2. Step 2: Convert to fraction form
    278,644.38/384,525.84 = 151,320.88/x
  3. Step 3: Cross multiply
    278,644.38x = 384,525.84 × 151,320.88
  4. Step 4: Simplify right side
    278,644.38x = 58,186,788,491.54
  5. Step 5: Solve for x
    x = 58,186,788,491.54/278,644.38
  6. Step 6: Final answer
    x = 208,820.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.