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Finding the Fourth Proportional to 860.60, 1,187.61 and 467.61

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Solution

The fourth proportional to 860.60, 1,187.61 and 467.61 is: 645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.60 : 1,187.61 = 467.61 : x
  2. Step 2: Convert to fraction form
    860.60/1,187.61 = 467.61/x
  3. Step 3: Cross multiply
    860.60x = 1,187.61 × 467.61
  4. Step 4: Simplify right side
    860.60x = 555,338.31
  5. Step 5: Solve for x
    x = 555,338.31/860.60
  6. Step 6: Final answer
    x = 645.30

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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.