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Finding the Fourth Proportional to 1,369.12, 2,045.12 and 903.04

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Solution

The fourth proportional to 1,369.12, 2,045.12 and 903.04 is: 1,348.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.12 : 2,045.12 = 903.04 : x
  2. Step 2: Convert to fraction form
    1,369.12/2,045.12 = 903.04/x
  3. Step 3: Cross multiply
    1,369.12x = 2,045.12 × 903.04
  4. Step 4: Simplify right side
    1,369.12x = 1,846,825.16
  5. Step 5: Solve for x
    x = 1,846,825.16/1,369.12
  6. Step 6: Final answer
    x = 1,348.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.