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Finding the Fourth Proportional to 657.90, 987.13 and 246.99

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Solution

The fourth proportional to 657.90, 987.13 and 246.99 is: 370.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.90 : 987.13 = 246.99 : x
  2. Step 2: Convert to fraction form
    657.90/987.13 = 246.99/x
  3. Step 3: Cross multiply
    657.90x = 987.13 × 246.99
  4. Step 4: Simplify right side
    657.90x = 243,811.24
  5. Step 5: Solve for x
    x = 243,811.24/657.90
  6. Step 6: Final answer
    x = 370.59

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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.