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Finding the Fourth Proportional to 650.88, 974.40 and 392.64

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Solution

The fourth proportional to 650.88, 974.40 and 392.64 is: 587.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.88 : 974.40 = 392.64 : x
  2. Step 2: Convert to fraction form
    650.88/974.40 = 392.64/x
  3. Step 3: Cross multiply
    650.88x = 974.40 × 392.64
  4. Step 4: Simplify right side
    650.88x = 382,588.42
  5. Step 5: Solve for x
    x = 382,588.42/650.88
  6. Step 6: Final answer
    x = 587.80

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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.