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Finding the Fourth Proportional to 656.26, 983.68 and 291.31

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Solution

The fourth proportional to 656.26, 983.68 and 291.31 is: 436.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.26 : 983.68 = 291.31 : x
  2. Step 2: Convert to fraction form
    656.26/983.68 = 291.31/x
  3. Step 3: Cross multiply
    656.26x = 983.68 × 291.31
  4. Step 4: Simplify right side
    656.26x = 286,555.82
  5. Step 5: Solve for x
    x = 286,555.82/656.26
  6. Step 6: Final answer
    x = 436.65

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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.