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Finding the Fourth Proportional to 655.76, 983.96 and 290.68

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Solution

The fourth proportional to 655.76, 983.96 and 290.68 is: 436.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.76 : 983.96 = 290.68 : x
  2. Step 2: Convert to fraction form
    655.76/983.96 = 290.68/x
  3. Step 3: Cross multiply
    655.76x = 983.96 × 290.68
  4. Step 4: Simplify right side
    655.76x = 286,017.49
  5. Step 5: Solve for x
    x = 286,017.49/655.76
  6. Step 6: Final answer
    x = 436.16

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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.