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Finding the Fourth Proportional to 1,611.72, 2,224.36 and 913.22

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Solution

The fourth proportional to 1,611.72, 2,224.36 and 913.22 is: 1,260.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.72 : 2,224.36 = 913.22 : x
  2. Step 2: Convert to fraction form
    1,611.72/2,224.36 = 913.22/x
  3. Step 3: Cross multiply
    1,611.72x = 2,224.36 × 913.22
  4. Step 4: Simplify right side
    1,611.72x = 2,031,330.04
  5. Step 5: Solve for x
    x = 2,031,330.04/1,611.72
  6. Step 6: Final answer
    x = 1,260.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.