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Finding the Fourth Proportional to 1,030.54, 1,422.15 and 736.31

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Solution

The fourth proportional to 1,030.54, 1,422.15 and 736.31 is: 1,016.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.54 : 1,422.15 = 736.31 : x
  2. Step 2: Convert to fraction form
    1,030.54/1,422.15 = 736.31/x
  3. Step 3: Cross multiply
    1,030.54x = 1,422.15 × 736.31
  4. Step 4: Simplify right side
    1,030.54x = 1,047,136.16
  5. Step 5: Solve for x
    x = 1,047,136.16/1,030.54
  6. Step 6: Final answer
    x = 1,016.11

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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.