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Finding the Fourth Proportional to 1,118.93, 1,679.00 and 657.61

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Solution

The fourth proportional to 1,118.93, 1,679.00 and 657.61 is: 986.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.93 : 1,679.00 = 657.61 : x
  2. Step 2: Convert to fraction form
    1,118.93/1,679.00 = 657.61/x
  3. Step 3: Cross multiply
    1,118.93x = 1,679.00 × 657.61
  4. Step 4: Simplify right side
    1,118.93x = 1,104,133.03
  5. Step 5: Solve for x
    x = 1,104,133.03/1,118.93
  6. Step 6: Final answer
    x = 986.77

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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.