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Finding the Fourth Proportional to 1,110.70, 1,663.62 and 964.90

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Solution

The fourth proportional to 1,110.70, 1,663.62 and 964.90 is: 1,445.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.70 : 1,663.62 = 964.90 : x
  2. Step 2: Convert to fraction form
    1,110.70/1,663.62 = 964.90/x
  3. Step 3: Cross multiply
    1,110.70x = 1,663.62 × 964.90
  4. Step 4: Simplify right side
    1,110.70x = 1,605,226.94
  5. Step 5: Solve for x
    x = 1,605,226.94/1,110.70
  6. Step 6: Final answer
    x = 1,445.24

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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.