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Finding the Fourth Proportional to 438.60, 603.41 and 426.45

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Solution

The fourth proportional to 438.60, 603.41 and 426.45 is: 586.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.60 : 603.41 = 426.45 : x
  2. Step 2: Convert to fraction form
    438.60/603.41 = 426.45/x
  3. Step 3: Cross multiply
    438.60x = 603.41 × 426.45
  4. Step 4: Simplify right side
    438.60x = 257,322.06
  5. Step 5: Solve for x
    x = 257,322.06/438.60
  6. Step 6: Final answer
    x = 586.69

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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.