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Finding the Fourth Proportional to 3,135, 4,702.77 and 826.50

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Solution

The fourth proportional to 3,135, 4,702.77 and 826.50 is: 1,239.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135 : 4,702.77 = 826.50 : x
  2. Step 2: Convert to fraction form
    3,135/4,702.77 = 826.50/x
  3. Step 3: Cross multiply
    3,135x = 4,702.77 × 826.50
  4. Step 4: Simplify right side
    3,135x = 3,886,839.41
  5. Step 5: Solve for x
    x = 3,886,839.41/3,135
  6. Step 6: Final answer
    x = 1,239.82

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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.