Home / 2,557.28-3,528.64-1,438.12

Finding the Fourth Proportional to 2,557.28, 3,528.64 and 1,438.12

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Solution

The fourth proportional to 2,557.28, 3,528.64 and 1,438.12 is: 1,984.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,557.28 : 3,528.64 = 1,438.12 : x
  2. Step 2: Convert to fraction form
    2,557.28/3,528.64 = 1,438.12/x
  3. Step 3: Cross multiply
    2,557.28x = 3,528.64 × 1,438.12
  4. Step 4: Simplify right side
    2,557.28x = 5,074,607.76
  5. Step 5: Solve for x
    x = 5,074,607.76/2,557.28
  6. Step 6: Final answer
    x = 1,984.38

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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.