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Finding the Fourth Proportional to 427.21, 589.55 and 240.70

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Solution

The fourth proportional to 427.21, 589.55 and 240.70 is: 332.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.21 : 589.55 = 240.70 : x
  2. Step 2: Convert to fraction form
    427.21/589.55 = 240.70/x
  3. Step 3: Cross multiply
    427.21x = 589.55 × 240.70
  4. Step 4: Simplify right side
    427.21x = 141,904.69
  5. Step 5: Solve for x
    x = 141,904.69/427.21
  6. Step 6: Final answer
    x = 332.17

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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.