Home / 2,557.98-3,529.68-1,438.78

Finding the Fourth Proportional to 2,557.98, 3,529.68 and 1,438.78

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Solution

The fourth proportional to 2,557.98, 3,529.68 and 1,438.78 is: 1,985.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,557.98 : 3,529.68 = 1,438.78 : x
  2. Step 2: Convert to fraction form
    2,557.98/3,529.68 = 1,438.78/x
  3. Step 3: Cross multiply
    2,557.98x = 3,529.68 × 1,438.78
  4. Step 4: Simplify right side
    2,557.98x = 5,078,432.99
  5. Step 5: Solve for x
    x = 5,078,432.99/2,557.98
  6. Step 6: Final answer
    x = 1,985.33

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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.