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Finding the Fourth Proportional to 914.67, 1,262.35 and 521.75

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Solution

The fourth proportional to 914.67, 1,262.35 and 521.75 is: 720.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.67 : 1,262.35 = 521.75 : x
  2. Step 2: Convert to fraction form
    914.67/1,262.35 = 521.75/x
  3. Step 3: Cross multiply
    914.67x = 1,262.35 × 521.75
  4. Step 4: Simplify right side
    914.67x = 658,631.11
  5. Step 5: Solve for x
    x = 658,631.11/914.67
  6. Step 6: Final answer
    x = 720.08

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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.