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Finding the Fourth Proportional to 836.39, 1,154.19 and 487.07

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Solution

The fourth proportional to 836.39, 1,154.19 and 487.07 is: 672.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.39 : 1,154.19 = 487.07 : x
  2. Step 2: Convert to fraction form
    836.39/1,154.19 = 487.07/x
  3. Step 3: Cross multiply
    836.39x = 1,154.19 × 487.07
  4. Step 4: Simplify right side
    836.39x = 562,171.32
  5. Step 5: Solve for x
    x = 562,171.32/836.39
  6. Step 6: Final answer
    x = 672.14

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Half scale
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Double scale
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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.