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Finding the Fourth Proportional to 659.95, 990.03 and 400.14

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Solution

The fourth proportional to 659.95, 990.03 and 400.14 is: 600.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.95 : 990.03 = 400.14 : x
  2. Step 2: Convert to fraction form
    659.95/990.03 = 400.14/x
  3. Step 3: Cross multiply
    659.95x = 990.03 × 400.14
  4. Step 4: Simplify right side
    659.95x = 396,150.60
  5. Step 5: Solve for x
    x = 396,150.60/659.95
  6. Step 6: Final answer
    x = 600.27

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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.