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Finding the Fourth Proportional to 1,320.71, 1,809.14 and 1,306.13

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Solution

The fourth proportional to 1,320.71, 1,809.14 and 1,306.13 is: 1,789.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.71 : 1,809.14 = 1,306.13 : x
  2. Step 2: Convert to fraction form
    1,320.71/1,809.14 = 1,306.13/x
  3. Step 3: Cross multiply
    1,320.71x = 1,809.14 × 1,306.13
  4. Step 4: Simplify right side
    1,320.71x = 2,362,956.45
  5. Step 5: Solve for x
    x = 2,362,956.45/1,320.71
  6. Step 6: Final answer
    x = 1,789.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.