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Finding the Fourth Proportional to 860.33, 1,187.26 and 528.75

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Solution

The fourth proportional to 860.33, 1,187.26 and 528.75 is: 729.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.33 : 1,187.26 = 528.75 : x
  2. Step 2: Convert to fraction form
    860.33/1,187.26 = 528.75/x
  3. Step 3: Cross multiply
    860.33x = 1,187.26 × 528.75
  4. Step 4: Simplify right side
    860.33x = 627,763.73
  5. Step 5: Solve for x
    x = 627,763.73/860.33
  6. Step 6: Final answer
    x = 729.68

Related Problems

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Half scale
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Double scale
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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.