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Finding the Fourth Proportional to 2,170.13, 3,255.19 and 631.13

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Solution

The fourth proportional to 2,170.13, 3,255.19 and 631.13 is: 946.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.13 : 3,255.19 = 631.13 : x
  2. Step 2: Convert to fraction form
    2,170.13/3,255.19 = 631.13/x
  3. Step 3: Cross multiply
    2,170.13x = 3,255.19 × 631.13
  4. Step 4: Simplify right side
    2,170.13x = 2,054,430.21
  5. Step 5: Solve for x
    x = 2,054,430.21/2,170.13
  6. Step 6: Final answer
    x = 946.69

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.