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Finding the Fourth Proportional to 411.13, 567.27 and 245.40

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Solution

The fourth proportional to 411.13, 567.27 and 245.40 is: 338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.13 : 567.27 = 245.40 : x
  2. Step 2: Convert to fraction form
    411.13/567.27 = 245.40/x
  3. Step 3: Cross multiply
    411.13x = 567.27 × 245.40
  4. Step 4: Simplify right side
    411.13x = 139,208.06
  5. Step 5: Solve for x
    x = 139,208.06/411.13
  6. Step 6: Final answer
    x = 338.60

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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.