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Finding the Fourth Proportional to 1,151.01, 1,734.82 and 990.63

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Solution

The fourth proportional to 1,151.01, 1,734.82 and 990.63 is: 1,493.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.01 : 1,734.82 = 990.63 : x
  2. Step 2: Convert to fraction form
    1,151.01/1,734.82 = 990.63/x
  3. Step 3: Cross multiply
    1,151.01x = 1,734.82 × 990.63
  4. Step 4: Simplify right side
    1,151.01x = 1,718,562.26
  5. Step 5: Solve for x
    x = 1,718,562.26/1,151.01
  6. Step 6: Final answer
    x = 1,493.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.