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Finding the Fourth Proportional to 656.22, 984.58 and 290.74

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Solution

The fourth proportional to 656.22, 984.58 and 290.74 is: 436.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.22 : 984.58 = 290.74 : x
  2. Step 2: Convert to fraction form
    656.22/984.58 = 290.74/x
  3. Step 3: Cross multiply
    656.22x = 984.58 × 290.74
  4. Step 4: Simplify right side
    656.22x = 286,256.79
  5. Step 5: Solve for x
    x = 286,256.79/656.22
  6. Step 6: Final answer
    x = 436.22

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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.