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Finding the Fourth Proportional to 860.52, 1,187.34 and 511.08

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Solution

The fourth proportional to 860.52, 1,187.34 and 511.08 is: 705.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.52 : 1,187.34 = 511.08 : x
  2. Step 2: Convert to fraction form
    860.52/1,187.34 = 511.08/x
  3. Step 3: Cross multiply
    860.52x = 1,187.34 × 511.08
  4. Step 4: Simplify right side
    860.52x = 606,825.73
  5. Step 5: Solve for x
    x = 606,825.73/860.52
  6. Step 6: Final answer
    x = 705.18

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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.