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Finding the Fourth Proportional to 656.22, 984.72 and 396.74

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Solution

The fourth proportional to 656.22, 984.72 and 396.74 is: 595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.22 : 984.72 = 396.74 : x
  2. Step 2: Convert to fraction form
    656.22/984.72 = 396.74/x
  3. Step 3: Cross multiply
    656.22x = 984.72 × 396.74
  4. Step 4: Simplify right side
    656.22x = 390,677.81
  5. Step 5: Solve for x
    x = 390,677.81/656.22
  6. Step 6: Final answer
    x = 595.35

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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.