Home / 3,123.12-4,681.62-1,478.28

Finding the Fourth Proportional to 3,123.12, 4,681.62 and 1,478.28

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Solution

The fourth proportional to 3,123.12, 4,681.62 and 1,478.28 is: 2,215.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.12 : 4,681.62 = 1,478.28 : x
  2. Step 2: Convert to fraction form
    3,123.12/4,681.62 = 1,478.28/x
  3. Step 3: Cross multiply
    3,123.12x = 4,681.62 × 1,478.28
  4. Step 4: Simplify right side
    3,123.12x = 6,920,745.21
  5. Step 5: Solve for x
    x = 6,920,745.21/3,123.12
  6. Step 6: Final answer
    x = 2,215.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.