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Finding the Fourth Proportional to 656.11, 984.40 and 291.16

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Solution

The fourth proportional to 656.11, 984.40 and 291.16 is: 436.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.11 : 984.40 = 291.16 : x
  2. Step 2: Convert to fraction form
    656.11/984.40 = 291.16/x
  3. Step 3: Cross multiply
    656.11x = 984.40 × 291.16
  4. Step 4: Simplify right side
    656.11x = 286,614.72
  5. Step 5: Solve for x
    x = 286,614.72/656.11
  6. Step 6: Final answer
    x = 436.84

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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.