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Finding the Fourth Proportional to 560.17, 772.98 and 311.50

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Solution

The fourth proportional to 560.17, 772.98 and 311.50 is: 429.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.17 : 772.98 = 311.50 : x
  2. Step 2: Convert to fraction form
    560.17/772.98 = 311.50/x
  3. Step 3: Cross multiply
    560.17x = 772.98 × 311.50
  4. Step 4: Simplify right side
    560.17x = 240,783.27
  5. Step 5: Solve for x
    x = 240,783.27/560.17
  6. Step 6: Final answer
    x = 429.84

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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.