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Finding the Fourth Proportional to 889.53, 1,330.65 and 741.91

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Solution

The fourth proportional to 889.53, 1,330.65 and 741.91 is: 1,109.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.53 : 1,330.65 = 741.91 : x
  2. Step 2: Convert to fraction form
    889.53/1,330.65 = 741.91/x
  3. Step 3: Cross multiply
    889.53x = 1,330.65 × 741.91
  4. Step 4: Simplify right side
    889.53x = 987,219.21
  5. Step 5: Solve for x
    x = 987,219.21/889.53
  6. Step 6: Final answer
    x = 1,109.82

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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.