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Finding the Fourth Proportional to 852.16, 1,278.24 and 365.21

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Solution

The fourth proportional to 852.16, 1,278.24 and 365.21 is: 547.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.16 : 1,278.24 = 365.21 : x
  2. Step 2: Convert to fraction form
    852.16/1,278.24 = 365.21/x
  3. Step 3: Cross multiply
    852.16x = 1,278.24 × 365.21
  4. Step 4: Simplify right side
    852.16x = 466,829.10
  5. Step 5: Solve for x
    x = 466,829.10/852.16
  6. Step 6: Final answer
    x = 547.82

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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.