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Finding the Fourth Proportional to 662.40, 914.08 and 426.02

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Solution

The fourth proportional to 662.40, 914.08 and 426.02 is: 587.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.40 : 914.08 = 426.02 : x
  2. Step 2: Convert to fraction form
    662.40/914.08 = 426.02/x
  3. Step 3: Cross multiply
    662.40x = 914.08 × 426.02
  4. Step 4: Simplify right side
    662.40x = 389,416.36
  5. Step 5: Solve for x
    x = 389,416.36/662.40
  6. Step 6: Final answer
    x = 587.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.