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Finding the Fourth Proportional to 1,330.31, 1,837.13 and 889.26

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Solution

The fourth proportional to 1,330.31, 1,837.13 and 889.26 is: 1,228.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.31 : 1,837.13 = 889.26 : x
  2. Step 2: Convert to fraction form
    1,330.31/1,837.13 = 889.26/x
  3. Step 3: Cross multiply
    1,330.31x = 1,837.13 × 889.26
  4. Step 4: Simplify right side
    1,330.31x = 1,633,681.78
  5. Step 5: Solve for x
    x = 1,633,681.78/1,330.31
  6. Step 6: Final answer
    x = 1,228.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.