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Finding the Fourth Proportional to 388.08, 580.86 and 296.64

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Solution

The fourth proportional to 388.08, 580.86 and 296.64 is: 444.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.08 : 580.86 = 296.64 : x
  2. Step 2: Convert to fraction form
    388.08/580.86 = 296.64/x
  3. Step 3: Cross multiply
    388.08x = 580.86 × 296.64
  4. Step 4: Simplify right side
    388.08x = 172,306.31
  5. Step 5: Solve for x
    x = 172,306.31/388.08
  6. Step 6: Final answer
    x = 444.00

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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.