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Finding the Fourth Proportional to 836.69, 1,154.86 and 487.44

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Solution

The fourth proportional to 836.69, 1,154.86 and 487.44 is: 672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.69 : 1,154.86 = 487.44 : x
  2. Step 2: Convert to fraction form
    836.69/1,154.86 = 487.44/x
  3. Step 3: Cross multiply
    836.69x = 1,154.86 × 487.44
  4. Step 4: Simplify right side
    836.69x = 562,923.74
  5. Step 5: Solve for x
    x = 562,923.74/836.69
  6. Step 6: Final answer
    x = 672.80

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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.