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Finding the Fourth Proportional to 572.84, 790.20 and 339.92

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Solution

The fourth proportional to 572.84, 790.20 and 339.92 is: 468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.84 : 790.20 = 339.92 : x
  2. Step 2: Convert to fraction form
    572.84/790.20 = 339.92/x
  3. Step 3: Cross multiply
    572.84x = 790.20 × 339.92
  4. Step 4: Simplify right side
    572.84x = 268,604.78
  5. Step 5: Solve for x
    x = 268,604.78/572.84
  6. Step 6: Final answer
    x = 468.90

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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.