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Finding the Fourth Proportional to 860.15, 1,186.29 and 747.93

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Solution

The fourth proportional to 860.15, 1,186.29 and 747.93 is: 1,031.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.15 : 1,186.29 = 747.93 : x
  2. Step 2: Convert to fraction form
    860.15/1,186.29 = 747.93/x
  3. Step 3: Cross multiply
    860.15x = 1,186.29 × 747.93
  4. Step 4: Simplify right side
    860.15x = 887,261.88
  5. Step 5: Solve for x
    x = 887,261.88/860.15
  6. Step 6: Final answer
    x = 1,031.53

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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.