Home / 1,638.42-2,261.25-1,140.18

Finding the Fourth Proportional to 1,638.42, 2,261.25 and 1,140.18

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Solution

The fourth proportional to 1,638.42, 2,261.25 and 1,140.18 is: 1,573.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.42 : 2,261.25 = 1,140.18 : x
  2. Step 2: Convert to fraction form
    1,638.42/2,261.25 = 1,140.18/x
  3. Step 3: Cross multiply
    1,638.42x = 2,261.25 × 1,140.18
  4. Step 4: Simplify right side
    1,638.42x = 2,578,232.03
  5. Step 5: Solve for x
    x = 2,578,232.03/1,638.42
  6. Step 6: Final answer
    x = 1,573.61

Related Problems

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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.