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Finding the Fourth Proportional to 2,826.18, 4,239.30 and 774.18

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Solution

The fourth proportional to 2,826.18, 4,239.30 and 774.18 is: 1,161.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,826.18 : 4,239.30 = 774.18 : x
  2. Step 2: Convert to fraction form
    2,826.18/4,239.30 = 774.18/x
  3. Step 3: Cross multiply
    2,826.18x = 4,239.30 × 774.18
  4. Step 4: Simplify right side
    2,826.18x = 3,281,981.27
  5. Step 5: Solve for x
    x = 3,281,981.27/2,826.18
  6. Step 6: Final answer
    x = 1,161.28

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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.