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Finding the Fourth Proportional to 948.36, 1,309.50 and 860.52

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Solution

The fourth proportional to 948.36, 1,309.50 and 860.52 is: 1,188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.36 : 1,309.50 = 860.52 : x
  2. Step 2: Convert to fraction form
    948.36/1,309.50 = 860.52/x
  3. Step 3: Cross multiply
    948.36x = 1,309.50 × 860.52
  4. Step 4: Simplify right side
    948.36x = 1,126,850.94
  5. Step 5: Solve for x
    x = 1,126,850.94/948.36
  6. Step 6: Final answer
    x = 1,188.21

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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.