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Finding the Fourth Proportional to 927.51, 1,279.97 and 578.13

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Solution

The fourth proportional to 927.51, 1,279.97 and 578.13 is: 797.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.51 : 1,279.97 = 578.13 : x
  2. Step 2: Convert to fraction form
    927.51/1,279.97 = 578.13/x
  3. Step 3: Cross multiply
    927.51x = 1,279.97 × 578.13
  4. Step 4: Simplify right side
    927.51x = 739,989.06
  5. Step 5: Solve for x
    x = 739,989.06/927.51
  6. Step 6: Final answer
    x = 797.82

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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.