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Finding the Fourth Proportional to 885.79, 1,327.71 and 679.82

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Solution

The fourth proportional to 885.79, 1,327.71 and 679.82 is: 1,018.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.79 : 1,327.71 = 679.82 : x
  2. Step 2: Convert to fraction form
    885.79/1,327.71 = 679.82/x
  3. Step 3: Cross multiply
    885.79x = 1,327.71 × 679.82
  4. Step 4: Simplify right side
    885.79x = 902,603.81
  5. Step 5: Solve for x
    x = 902,603.81/885.79
  6. Step 6: Final answer
    x = 1,018.99

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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.