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Finding the Fourth Proportional to 860.66, 1,187.76 and 529.44

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Solution

The fourth proportional to 860.66, 1,187.76 and 529.44 is: 730.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.66 : 1,187.76 = 529.44 : x
  2. Step 2: Convert to fraction form
    860.66/1,187.76 = 529.44/x
  3. Step 3: Cross multiply
    860.66x = 1,187.76 × 529.44
  4. Step 4: Simplify right side
    860.66x = 628,847.65
  5. Step 5: Solve for x
    x = 628,847.65/860.66
  6. Step 6: Final answer
    x = 730.66

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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.