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Finding the Fourth Proportional to 703.40, 1,057.20 and 582.44

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Solution

The fourth proportional to 703.40, 1,057.20 and 582.44 is: 875.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.40 : 1,057.20 = 582.44 : x
  2. Step 2: Convert to fraction form
    703.40/1,057.20 = 582.44/x
  3. Step 3: Cross multiply
    703.40x = 1,057.20 × 582.44
  4. Step 4: Simplify right side
    703.40x = 615,755.57
  5. Step 5: Solve for x
    x = 615,755.57/703.40
  6. Step 6: Final answer
    x = 875.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.