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Finding the Fourth Proportional to 2,011.96, 2,775.90 and 1,225.18

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Solution

The fourth proportional to 2,011.96, 2,775.90 and 1,225.18 is: 1,690.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.96 : 2,775.90 = 1,225.18 : x
  2. Step 2: Convert to fraction form
    2,011.96/2,775.90 = 1,225.18/x
  3. Step 3: Cross multiply
    2,011.96x = 2,775.90 × 1,225.18
  4. Step 4: Simplify right side
    2,011.96x = 3,400,977.16
  5. Step 5: Solve for x
    x = 3,400,977.16/2,011.96
  6. Step 6: Final answer
    x = 1,690.38

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Half scale
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Double scale
Find fourth proportional to 2,012.96, 2,777.28 and 1,226.18
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.