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Finding the Fourth Proportional to 1,173.50, 1,761.03 and 1,071.42

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Solution

The fourth proportional to 1,173.50, 1,761.03 and 1,071.42 is: 1,607.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.50 : 1,761.03 = 1,071.42 : x
  2. Step 2: Convert to fraction form
    1,173.50/1,761.03 = 1,071.42/x
  3. Step 3: Cross multiply
    1,173.50x = 1,761.03 × 1,071.42
  4. Step 4: Simplify right side
    1,173.50x = 1,886,802.76
  5. Step 5: Solve for x
    x = 1,886,802.76/1,173.50
  6. Step 6: Final answer
    x = 1,607.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.