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Finding the Fourth Proportional to 860.97, 1,187.49 and 651.18

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Solution

The fourth proportional to 860.97, 1,187.49 and 651.18 is: 898.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.97 : 1,187.49 = 651.18 : x
  2. Step 2: Convert to fraction form
    860.97/1,187.49 = 651.18/x
  3. Step 3: Cross multiply
    860.97x = 1,187.49 × 651.18
  4. Step 4: Simplify right side
    860.97x = 773,269.74
  5. Step 5: Solve for x
    x = 773,269.74/860.97
  6. Step 6: Final answer
    x = 898.14

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1.5x scale

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.