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Finding the Fourth Proportional to 789.20, 1,088.40 and 527.36

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Solution

The fourth proportional to 789.20, 1,088.40 and 527.36 is: 727.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.20 : 1,088.40 = 527.36 : x
  2. Step 2: Convert to fraction form
    789.20/1,088.40 = 527.36/x
  3. Step 3: Cross multiply
    789.20x = 1,088.40 × 527.36
  4. Step 4: Simplify right side
    789.20x = 573,978.62
  5. Step 5: Solve for x
    x = 573,978.62/789.20
  6. Step 6: Final answer
    x = 727.29

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1.5x scale

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.