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Finding the Fourth Proportional to 1,369.80, 2,054.52 and 869.52

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Solution

The fourth proportional to 1,369.80, 2,054.52 and 869.52 is: 1,304.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.80 : 2,054.52 = 869.52 : x
  2. Step 2: Convert to fraction form
    1,369.80/2,054.52 = 869.52/x
  3. Step 3: Cross multiply
    1,369.80x = 2,054.52 × 869.52
  4. Step 4: Simplify right side
    1,369.80x = 1,786,446.23
  5. Step 5: Solve for x
    x = 1,786,446.23/1,369.80
  6. Step 6: Final answer
    x = 1,304.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.