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Finding the Fourth Proportional to 860.15, 1,186.99 and 467.18

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Solution

The fourth proportional to 860.15, 1,186.99 and 467.18 is: 644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.15 : 1,186.99 = 467.18 : x
  2. Step 2: Convert to fraction form
    860.15/1,186.99 = 467.18/x
  3. Step 3: Cross multiply
    860.15x = 1,186.99 × 467.18
  4. Step 4: Simplify right side
    860.15x = 554,537.99
  5. Step 5: Solve for x
    x = 554,537.99/860.15
  6. Step 6: Final answer
    x = 644.70

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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.