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Finding the Fourth Proportional to 1,165.72, 1,608.90 and 700

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Solution

The fourth proportional to 1,165.72, 1,608.90 and 700 is: 966.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.72 : 1,608.90 = 700 : x
  2. Step 2: Convert to fraction form
    1,165.72/1,608.90 = 700/x
  3. Step 3: Cross multiply
    1,165.72x = 1,608.90 × 700
  4. Step 4: Simplify right side
    1,165.72x = 1,126,230
  5. Step 5: Solve for x
    x = 1,126,230/1,165.72
  6. Step 6: Final answer
    x = 966.12

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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.