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Finding the Fourth Proportional to 402.69, 555.26 and 330.62

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Solution

The fourth proportional to 402.69, 555.26 and 330.62 is: 455.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.69 : 555.26 = 330.62 : x
  2. Step 2: Convert to fraction form
    402.69/555.26 = 330.62/x
  3. Step 3: Cross multiply
    402.69x = 555.26 × 330.62
  4. Step 4: Simplify right side
    402.69x = 183,575.63
  5. Step 5: Solve for x
    x = 183,575.63/402.69
  6. Step 6: Final answer
    x = 455.87

Related Problems

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Double scale
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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.