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Finding the Fourth Proportional to 656.05, 983.15 and 290.74

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Solution

The fourth proportional to 656.05, 983.15 and 290.74 is: 435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.05 : 983.15 = 290.74 : x
  2. Step 2: Convert to fraction form
    656.05/983.15 = 290.74/x
  3. Step 3: Cross multiply
    656.05x = 983.15 × 290.74
  4. Step 4: Simplify right side
    656.05x = 285,834.66
  5. Step 5: Solve for x
    x = 285,834.66/656.05
  6. Step 6: Final answer
    x = 435.69

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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.