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Finding the Fourth Proportional to 2,145.11, 3,217.02 and 912.50

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Solution

The fourth proportional to 2,145.11, 3,217.02 and 912.50 is: 1,368.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.11 : 3,217.02 = 912.50 : x
  2. Step 2: Convert to fraction form
    2,145.11/3,217.02 = 912.50/x
  3. Step 3: Cross multiply
    2,145.11x = 3,217.02 × 912.50
  4. Step 4: Simplify right side
    2,145.11x = 2,935,530.75
  5. Step 5: Solve for x
    x = 2,935,530.75/2,145.11
  6. Step 6: Final answer
    x = 1,368.48

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,146.11, 3,218.52 and 913.50
Similar ratio
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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.