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Finding the Fourth Proportional to 866.89, 1,298.49 and 701.65

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Solution

The fourth proportional to 866.89, 1,298.49 and 701.65 is: 1,050.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.89 : 1,298.49 = 701.65 : x
  2. Step 2: Convert to fraction form
    866.89/1,298.49 = 701.65/x
  3. Step 3: Cross multiply
    866.89x = 1,298.49 × 701.65
  4. Step 4: Simplify right side
    866.89x = 911,085.51
  5. Step 5: Solve for x
    x = 911,085.51/866.89
  6. Step 6: Final answer
    x = 1,050.98

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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.