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Finding the Fourth Proportional to 914.74, 1,262.39 and 521.75

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Solution

The fourth proportional to 914.74, 1,262.39 and 521.75 is: 720.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.74 : 1,262.39 = 521.75 : x
  2. Step 2: Convert to fraction form
    914.74/1,262.39 = 521.75/x
  3. Step 3: Cross multiply
    914.74x = 1,262.39 × 521.75
  4. Step 4: Simplify right side
    914.74x = 658,652.53
  5. Step 5: Solve for x
    x = 658,652.53/914.74
  6. Step 6: Final answer
    x = 720.05

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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.