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Finding the Fourth Proportional to 1,167.08, 1,610.76 and 695

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Solution

The fourth proportional to 1,167.08, 1,610.76 and 695 is: 959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.08 : 1,610.76 = 695 : x
  2. Step 2: Convert to fraction form
    1,167.08/1,610.76 = 695/x
  3. Step 3: Cross multiply
    1,167.08x = 1,610.76 × 695
  4. Step 4: Simplify right side
    1,167.08x = 1,119,478.20
  5. Step 5: Solve for x
    x = 1,119,478.20/1,167.08
  6. Step 6: Final answer
    x = 959.21

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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.