Home / 1,102.31-1,521.23-630.28

Finding the Fourth Proportional to 1,102.31, 1,521.23 and 630.28

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Solution

The fourth proportional to 1,102.31, 1,521.23 and 630.28 is: 869.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.31 : 1,521.23 = 630.28 : x
  2. Step 2: Convert to fraction form
    1,102.31/1,521.23 = 630.28/x
  3. Step 3: Cross multiply
    1,102.31x = 1,521.23 × 630.28
  4. Step 4: Simplify right side
    1,102.31x = 958,803.14
  5. Step 5: Solve for x
    x = 958,803.14/1,102.31
  6. Step 6: Final answer
    x = 869.81

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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.