Home / 2,930.34-4,379.78-2,557.20

Finding the Fourth Proportional to 2,930.34, 4,379.78 and 2,557.20

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Solution

The fourth proportional to 2,930.34, 4,379.78 and 2,557.20 is: 3,822.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.34 : 4,379.78 = 2,557.20 : x
  2. Step 2: Convert to fraction form
    2,930.34/4,379.78 = 2,557.20/x
  3. Step 3: Cross multiply
    2,930.34x = 4,379.78 × 2,557.20
  4. Step 4: Simplify right side
    2,930.34x = 11,199,973.42
  5. Step 5: Solve for x
    x = 11,199,973.42/2,930.34
  6. Step 6: Final answer
    x = 3,822.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.