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Finding the Fourth Proportional to 846.93, 1,270.38 and 521.70

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Solution

The fourth proportional to 846.93, 1,270.38 and 521.70 is: 782.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.93 : 1,270.38 = 521.70 : x
  2. Step 2: Convert to fraction form
    846.93/1,270.38 = 521.70/x
  3. Step 3: Cross multiply
    846.93x = 1,270.38 × 521.70
  4. Step 4: Simplify right side
    846.93x = 662,757.25
  5. Step 5: Solve for x
    x = 662,757.25/846.93
  6. Step 6: Final answer
    x = 782.54

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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.