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Finding the Fourth Proportional to 656.31, 984.81 and 291.36

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Solution

The fourth proportional to 656.31, 984.81 and 291.36 is: 437.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.31 : 984.81 = 291.36 : x
  2. Step 2: Convert to fraction form
    656.31/984.81 = 291.36/x
  3. Step 3: Cross multiply
    656.31x = 984.81 × 291.36
  4. Step 4: Simplify right side
    656.31x = 286,934.24
  5. Step 5: Solve for x
    x = 286,934.24/656.31
  6. Step 6: Final answer
    x = 437.19

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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.