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Finding the Fourth Proportional to 438.92, 605.70 and 264.28

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Solution

The fourth proportional to 438.92, 605.70 and 264.28 is: 364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.92 : 605.70 = 264.28 : x
  2. Step 2: Convert to fraction form
    438.92/605.70 = 264.28/x
  3. Step 3: Cross multiply
    438.92x = 605.70 × 264.28
  4. Step 4: Simplify right side
    438.92x = 160,074.40
  5. Step 5: Solve for x
    x = 160,074.40/438.92
  6. Step 6: Final answer
    x = 364.70

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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.