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Finding the Fourth Proportional to 860.67, 1,187.19 and 694.89

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Solution

The fourth proportional to 860.67, 1,187.19 and 694.89 is: 958.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.67 : 1,187.19 = 694.89 : x
  2. Step 2: Convert to fraction form
    860.67/1,187.19 = 694.89/x
  3. Step 3: Cross multiply
    860.67x = 1,187.19 × 694.89
  4. Step 4: Simplify right side
    860.67x = 824,966.46
  5. Step 5: Solve for x
    x = 824,966.46/860.67
  6. Step 6: Final answer
    x = 958.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.