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Finding the Fourth Proportional to 659.68, 990 and 294.88

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Solution

The fourth proportional to 659.68, 990 and 294.88 is: 442.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.68 : 990 = 294.88 : x
  2. Step 2: Convert to fraction form
    659.68/990 = 294.88/x
  3. Step 3: Cross multiply
    659.68x = 990 × 294.88
  4. Step 4: Simplify right side
    659.68x = 291,931.20
  5. Step 5: Solve for x
    x = 291,931.20/659.68
  6. Step 6: Final answer
    x = 442.53

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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.