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Finding the Fourth Proportional to 3,605.16, 4,975.20 and 1,990.11

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Solution

The fourth proportional to 3,605.16, 4,975.20 and 1,990.11 is: 2,746.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.16 : 4,975.20 = 1,990.11 : x
  2. Step 2: Convert to fraction form
    3,605.16/4,975.20 = 1,990.11/x
  3. Step 3: Cross multiply
    3,605.16x = 4,975.20 × 1,990.11
  4. Step 4: Simplify right side
    3,605.16x = 9,901,195.27
  5. Step 5: Solve for x
    x = 9,901,195.27/3,605.16
  6. Step 6: Final answer
    x = 2,746.40

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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.