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Finding the Fourth Proportional to 562.78, 776.58 and 330.04

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Solution

The fourth proportional to 562.78, 776.58 and 330.04 is: 455.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.78 : 776.58 = 330.04 : x
  2. Step 2: Convert to fraction form
    562.78/776.58 = 330.04/x
  3. Step 3: Cross multiply
    562.78x = 776.58 × 330.04
  4. Step 4: Simplify right side
    562.78x = 256,302.46
  5. Step 5: Solve for x
    x = 256,302.46/562.78
  6. Step 6: Final answer
    x = 455.42

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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.