Home / 1,102.04-1,521.14-630.21

Finding the Fourth Proportional to 1,102.04, 1,521.14 and 630.21

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Solution

The fourth proportional to 1,102.04, 1,521.14 and 630.21 is: 869.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.04 : 1,521.14 = 630.21 : x
  2. Step 2: Convert to fraction form
    1,102.04/1,521.14 = 630.21/x
  3. Step 3: Cross multiply
    1,102.04x = 1,521.14 × 630.21
  4. Step 4: Simplify right side
    1,102.04x = 958,631.79
  5. Step 5: Solve for x
    x = 958,631.79/1,102.04
  6. Step 6: Final answer
    x = 869.87

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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.