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Finding the Fourth Proportional to 659.86, 990.96 and 589.30

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Solution

The fourth proportional to 659.86, 990.96 and 589.30 is: 884.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.86 : 990.96 = 589.30 : x
  2. Step 2: Convert to fraction form
    659.86/990.96 = 589.30/x
  3. Step 3: Cross multiply
    659.86x = 990.96 × 589.30
  4. Step 4: Simplify right side
    659.86x = 583,972.73
  5. Step 5: Solve for x
    x = 583,972.73/659.86
  6. Step 6: Final answer
    x = 884.99

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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.