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Finding the Fourth Proportional to 1,149.72, 1,724.64 and 977.59

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Solution

The fourth proportional to 1,149.72, 1,724.64 and 977.59 is: 1,466.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.72 : 1,724.64 = 977.59 : x
  2. Step 2: Convert to fraction form
    1,149.72/1,724.64 = 977.59/x
  3. Step 3: Cross multiply
    1,149.72x = 1,724.64 × 977.59
  4. Step 4: Simplify right side
    1,149.72x = 1,685,990.82
  5. Step 5: Solve for x
    x = 1,685,990.82/1,149.72
  6. Step 6: Final answer
    x = 1,466.44

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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.