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Finding the Fourth Proportional to 1,099.65, 1,649.52 and 807.51

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Solution

The fourth proportional to 1,099.65, 1,649.52 and 807.51 is: 1,211.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.65 : 1,649.52 = 807.51 : x
  2. Step 2: Convert to fraction form
    1,099.65/1,649.52 = 807.51/x
  3. Step 3: Cross multiply
    1,099.65x = 1,649.52 × 807.51
  4. Step 4: Simplify right side
    1,099.65x = 1,332,003.90
  5. Step 5: Solve for x
    x = 1,332,003.90/1,099.65
  6. Step 6: Final answer
    x = 1,211.30

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1.5x scale

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.