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Finding the Fourth Proportional to 847.21, 1,169.21 and 474.19

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Solution

The fourth proportional to 847.21, 1,169.21 and 474.19 is: 654.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.21 : 1,169.21 = 474.19 : x
  2. Step 2: Convert to fraction form
    847.21/1,169.21 = 474.19/x
  3. Step 3: Cross multiply
    847.21x = 1,169.21 × 474.19
  4. Step 4: Simplify right side
    847.21x = 554,427.69
  5. Step 5: Solve for x
    x = 554,427.69/847.21
  6. Step 6: Final answer
    x = 654.42

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.