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Finding the Fourth Proportional to 560.80, 773.76 and 339.88

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Solution

The fourth proportional to 560.80, 773.76 and 339.88 is: 468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.80 : 773.76 = 339.88 : x
  2. Step 2: Convert to fraction form
    560.80/773.76 = 339.88/x
  3. Step 3: Cross multiply
    560.80x = 773.76 × 339.88
  4. Step 4: Simplify right side
    560.80x = 262,985.55
  5. Step 5: Solve for x
    x = 262,985.55/560.80
  6. Step 6: Final answer
    x = 468.95

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1.5x scale

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.