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Finding the Fourth Proportional to 842.32, 1,162.38 and 817.48

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Solution

The fourth proportional to 842.32, 1,162.38 and 817.48 is: 1,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.32 : 1,162.38 = 817.48 : x
  2. Step 2: Convert to fraction form
    842.32/1,162.38 = 817.48/x
  3. Step 3: Cross multiply
    842.32x = 1,162.38 × 817.48
  4. Step 4: Simplify right side
    842.32x = 950,222.40
  5. Step 5: Solve for x
    x = 950,222.40/842.32
  6. Step 6: Final answer
    x = 1,128.10

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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.