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Finding the Fourth Proportional to 659.10, 987.79 and 350.30

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Solution

The fourth proportional to 659.10, 987.79 and 350.30 is: 524.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.10 : 987.79 = 350.30 : x
  2. Step 2: Convert to fraction form
    659.10/987.79 = 350.30/x
  3. Step 3: Cross multiply
    659.10x = 987.79 × 350.30
  4. Step 4: Simplify right side
    659.10x = 346,022.84
  5. Step 5: Solve for x
    x = 346,022.84/659.10
  6. Step 6: Final answer
    x = 524.99

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.