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Finding the Fourth Proportional to 841.92, 1,161.60 and 814.08

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Solution

The fourth proportional to 841.92, 1,161.60 and 814.08 is: 1,123.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.92 : 1,161.60 = 814.08 : x
  2. Step 2: Convert to fraction form
    841.92/1,161.60 = 814.08/x
  3. Step 3: Cross multiply
    841.92x = 1,161.60 × 814.08
  4. Step 4: Simplify right side
    841.92x = 945,635.33
  5. Step 5: Solve for x
    x = 945,635.33/841.92
  6. Step 6: Final answer
    x = 1,123.19

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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.