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Finding the Fourth Proportional to 2,865.25, 4,298.42 and 813.25

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Solution

The fourth proportional to 2,865.25, 4,298.42 and 813.25 is: 1,220.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.25 : 4,298.42 = 813.25 : x
  2. Step 2: Convert to fraction form
    2,865.25/4,298.42 = 813.25/x
  3. Step 3: Cross multiply
    2,865.25x = 4,298.42 × 813.25
  4. Step 4: Simplify right side
    2,865.25x = 3,495,690.07
  5. Step 5: Solve for x
    x = 3,495,690.07/2,865.25
  6. Step 6: Final answer
    x = 1,220.03

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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.