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Finding the Fourth Proportional to 572.68, 790.18 and 339.80

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Solution

The fourth proportional to 572.68, 790.18 and 339.80 is: 468.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.68 : 790.18 = 339.80 : x
  2. Step 2: Convert to fraction form
    572.68/790.18 = 339.80/x
  3. Step 3: Cross multiply
    572.68x = 790.18 × 339.80
  4. Step 4: Simplify right side
    572.68x = 268,503.16
  5. Step 5: Solve for x
    x = 268,503.16/572.68
  6. Step 6: Final answer
    x = 468.85

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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.