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Finding the Fourth Proportional to 1,253.84, 1,726.80 and 1,009.76

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Solution

The fourth proportional to 1,253.84, 1,726.80 and 1,009.76 is: 1,390.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.84 : 1,726.80 = 1,009.76 : x
  2. Step 2: Convert to fraction form
    1,253.84/1,726.80 = 1,009.76/x
  3. Step 3: Cross multiply
    1,253.84x = 1,726.80 × 1,009.76
  4. Step 4: Simplify right side
    1,253.84x = 1,743,653.57
  5. Step 5: Solve for x
    x = 1,743,653.57/1,253.84
  6. Step 6: Final answer
    x = 1,390.65

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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.