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Finding the Fourth Proportional to 560.31, 772.87 and 361.40

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Solution

The fourth proportional to 560.31, 772.87 and 361.40 is: 498.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.31 : 772.87 = 361.40 : x
  2. Step 2: Convert to fraction form
    560.31/772.87 = 361.40/x
  3. Step 3: Cross multiply
    560.31x = 772.87 × 361.40
  4. Step 4: Simplify right side
    560.31x = 279,315.22
  5. Step 5: Solve for x
    x = 279,315.22/560.31
  6. Step 6: Final answer
    x = 498.50

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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.