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Finding the Fourth Proportional to 846.62, 1,269.57 and 521.90

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Solution

The fourth proportional to 846.62, 1,269.57 and 521.90 is: 782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.62 : 1,269.57 = 521.90 : x
  2. Step 2: Convert to fraction form
    846.62/1,269.57 = 521.90/x
  3. Step 3: Cross multiply
    846.62x = 1,269.57 × 521.90
  4. Step 4: Simplify right side
    846.62x = 662,588.58
  5. Step 5: Solve for x
    x = 662,588.58/846.62
  6. Step 6: Final answer
    x = 782.63

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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.