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Finding the Fourth Proportional to 836.80, 1,254.48 and 445.92

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Solution

The fourth proportional to 836.80, 1,254.48 and 445.92 is: 668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.80 : 1,254.48 = 445.92 : x
  2. Step 2: Convert to fraction form
    836.80/1,254.48 = 445.92/x
  3. Step 3: Cross multiply
    836.80x = 1,254.48 × 445.92
  4. Step 4: Simplify right side
    836.80x = 559,397.72
  5. Step 5: Solve for x
    x = 559,397.72/836.80
  6. Step 6: Final answer
    x = 668.50

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Double scale
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1.5x scale

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.