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Finding the Fourth Proportional to 1,173.10, 1,618.93 and 675.81

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Solution

The fourth proportional to 1,173.10, 1,618.93 and 675.81 is: 932.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.10 : 1,618.93 = 675.81 : x
  2. Step 2: Convert to fraction form
    1,173.10/1,618.93 = 675.81/x
  3. Step 3: Cross multiply
    1,173.10x = 1,618.93 × 675.81
  4. Step 4: Simplify right side
    1,173.10x = 1,094,077.61
  5. Step 5: Solve for x
    x = 1,094,077.61/1,173.10
  6. Step 6: Final answer
    x = 932.64

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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.