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Finding the Fourth Proportional to 1,166.72, 1,748.48 and 645.94

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Solution

The fourth proportional to 1,166.72, 1,748.48 and 645.94 is: 968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.72 : 1,748.48 = 645.94 : x
  2. Step 2: Convert to fraction form
    1,166.72/1,748.48 = 645.94/x
  3. Step 3: Cross multiply
    1,166.72x = 1,748.48 × 645.94
  4. Step 4: Simplify right side
    1,166.72x = 1,129,413.17
  5. Step 5: Solve for x
    x = 1,129,413.17/1,166.72
  6. Step 6: Final answer
    x = 968.02

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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.