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Finding the Fourth Proportional to 655.65, 983.73 and 290.19

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Solution

The fourth proportional to 655.65, 983.73 and 290.19 is: 435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.65 : 983.73 = 290.19 : x
  2. Step 2: Convert to fraction form
    655.65/983.73 = 290.19/x
  3. Step 3: Cross multiply
    655.65x = 983.73 × 290.19
  4. Step 4: Simplify right side
    655.65x = 285,468.61
  5. Step 5: Solve for x
    x = 285,468.61/655.65
  6. Step 6: Final answer
    x = 435.40

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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.