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Finding the Fourth Proportional to 1,009.07, 1,392.58 and 759.95

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Solution

The fourth proportional to 1,009.07, 1,392.58 and 759.95 is: 1,048.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.07 : 1,392.58 = 759.95 : x
  2. Step 2: Convert to fraction form
    1,009.07/1,392.58 = 759.95/x
  3. Step 3: Cross multiply
    1,009.07x = 1,392.58 × 759.95
  4. Step 4: Simplify right side
    1,009.07x = 1,058,291.17
  5. Step 5: Solve for x
    x = 1,058,291.17/1,009.07
  6. Step 6: Final answer
    x = 1,048.78

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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.