Home / 2,557.20-3,528.80-1,438.16

Finding the Fourth Proportional to 2,557.20, 3,528.80 and 1,438.16

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Solution

The fourth proportional to 2,557.20, 3,528.80 and 1,438.16 is: 1,984.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,557.20 : 3,528.80 = 1,438.16 : x
  2. Step 2: Convert to fraction form
    2,557.20/3,528.80 = 1,438.16/x
  3. Step 3: Cross multiply
    2,557.20x = 3,528.80 × 1,438.16
  4. Step 4: Simplify right side
    2,557.20x = 5,074,979.01
  5. Step 5: Solve for x
    x = 5,074,979.01/2,557.20
  6. Step 6: Final answer
    x = 1,984.58

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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.