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Finding the Fourth Proportional to 1,092.16, 1,507.05 and 620.11

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Solution

The fourth proportional to 1,092.16, 1,507.05 and 620.11 is: 855.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.16 : 1,507.05 = 620.11 : x
  2. Step 2: Convert to fraction form
    1,092.16/1,507.05 = 620.11/x
  3. Step 3: Cross multiply
    1,092.16x = 1,507.05 × 620.11
  4. Step 4: Simplify right side
    1,092.16x = 934,536.78
  5. Step 5: Solve for x
    x = 934,536.78/1,092.16
  6. Step 6: Final answer
    x = 855.68

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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.