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Finding the Fourth Proportional to 922.19, 1,272.51 and 523.71

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Solution

The fourth proportional to 922.19, 1,272.51 and 523.71 is: 722.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.19 : 1,272.51 = 523.71 : x
  2. Step 2: Convert to fraction form
    922.19/1,272.51 = 523.71/x
  3. Step 3: Cross multiply
    922.19x = 1,272.51 × 523.71
  4. Step 4: Simplify right side
    922.19x = 666,427.99
  5. Step 5: Solve for x
    x = 666,427.99/922.19
  6. Step 6: Final answer
    x = 722.66

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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.