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Finding the Fourth Proportional to 2,895.61, 4,343.11 and 815.56

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Solution

The fourth proportional to 2,895.61, 4,343.11 and 815.56 is: 1,223.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,895.61 : 4,343.11 = 815.56 : x
  2. Step 2: Convert to fraction form
    2,895.61/4,343.11 = 815.56/x
  3. Step 3: Cross multiply
    2,895.61x = 4,343.11 × 815.56
  4. Step 4: Simplify right side
    2,895.61x = 3,542,066.79
  5. Step 5: Solve for x
    x = 3,542,066.79/2,895.61
  6. Step 6: Final answer
    x = 1,223.25

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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.