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Finding the Fourth Proportional to 860.98, 1,187.28 and 737.05

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Solution

The fourth proportional to 860.98, 1,187.28 and 737.05 is: 1,016.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.98 : 1,187.28 = 737.05 : x
  2. Step 2: Convert to fraction form
    860.98/1,187.28 = 737.05/x
  3. Step 3: Cross multiply
    860.98x = 1,187.28 × 737.05
  4. Step 4: Simplify right side
    860.98x = 875,084.72
  5. Step 5: Solve for x
    x = 875,084.72/860.98
  6. Step 6: Final answer
    x = 1,016.38

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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.