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Finding the Fourth Proportional to 1,174.86, 1,618.70 and 859.59

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Solution

The fourth proportional to 1,174.86, 1,618.70 and 859.59 is: 1,184.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.86 : 1,618.70 = 859.59 : x
  2. Step 2: Convert to fraction form
    1,174.86/1,618.70 = 859.59/x
  3. Step 3: Cross multiply
    1,174.86x = 1,618.70 × 859.59
  4. Step 4: Simplify right side
    1,174.86x = 1,391,414.04
  5. Step 5: Solve for x
    x = 1,391,414.04/1,174.86
  6. Step 6: Final answer
    x = 1,184.32

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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.