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Finding the Fourth Proportional to 1,035.62, 1,549.86 and 645.44

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Solution

The fourth proportional to 1,035.62, 1,549.86 and 645.44 is: 965.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.62 : 1,549.86 = 645.44 : x
  2. Step 2: Convert to fraction form
    1,035.62/1,549.86 = 645.44/x
  3. Step 3: Cross multiply
    1,035.62x = 1,549.86 × 645.44
  4. Step 4: Simplify right side
    1,035.62x = 1,000,341.64
  5. Step 5: Solve for x
    x = 1,000,341.64/1,035.62
  6. Step 6: Final answer
    x = 965.94

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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.