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Finding the Fourth Proportional to 659.16, 989.10 and 398.52

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Solution

The fourth proportional to 659.16, 989.10 and 398.52 is: 598.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.16 : 989.10 = 398.52 : x
  2. Step 2: Convert to fraction form
    659.16/989.10 = 398.52/x
  3. Step 3: Cross multiply
    659.16x = 989.10 × 398.52
  4. Step 4: Simplify right side
    659.16x = 394,176.13
  5. Step 5: Solve for x
    x = 394,176.13/659.16
  6. Step 6: Final answer
    x = 598.00

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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.