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Finding the Fourth Proportional to 931.20, 1,284.96 and 582

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Solution

The fourth proportional to 931.20, 1,284.96 and 582 is: 803.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.20 : 1,284.96 = 582 : x
  2. Step 2: Convert to fraction form
    931.20/1,284.96 = 582/x
  3. Step 3: Cross multiply
    931.20x = 1,284.96 × 582
  4. Step 4: Simplify right side
    931.20x = 747,846.72
  5. Step 5: Solve for x
    x = 747,846.72/931.20
  6. Step 6: Final answer
    x = 803.10

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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.