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Finding the Fourth Proportional to 560.01, 772.86 and 391.98

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Solution

The fourth proportional to 560.01, 772.86 and 391.98 is: 540.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.01 : 772.86 = 391.98 : x
  2. Step 2: Convert to fraction form
    560.01/772.86 = 391.98/x
  3. Step 3: Cross multiply
    560.01x = 772.86 × 391.98
  4. Step 4: Simplify right side
    560.01x = 302,945.66
  5. Step 5: Solve for x
    x = 302,945.66/560.01
  6. Step 6: Final answer
    x = 540.96

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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.