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Finding the Fourth Proportional to 947.11, 1,307.22 and 549.05

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Solution

The fourth proportional to 947.11, 1,307.22 and 549.05 is: 757.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.11 : 1,307.22 = 549.05 : x
  2. Step 2: Convert to fraction form
    947.11/1,307.22 = 549.05/x
  3. Step 3: Cross multiply
    947.11x = 1,307.22 × 549.05
  4. Step 4: Simplify right side
    947.11x = 717,729.14
  5. Step 5: Solve for x
    x = 717,729.14/947.11
  6. Step 6: Final answer
    x = 757.81

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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.