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Finding the Fourth Proportional to 3,126.24, 4,689.04 and 817.74

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Solution

The fourth proportional to 3,126.24, 4,689.04 and 817.74 is: 1,226.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.24 : 4,689.04 = 817.74 : x
  2. Step 2: Convert to fraction form
    3,126.24/4,689.04 = 817.74/x
  3. Step 3: Cross multiply
    3,126.24x = 4,689.04 × 817.74
  4. Step 4: Simplify right side
    3,126.24x = 3,834,415.57
  5. Step 5: Solve for x
    x = 3,834,415.57/3,126.24
  6. Step 6: Final answer
    x = 1,226.53

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1.5x scale

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.