Home / 3,120.32-4,681.52-1,388.96

Finding the Fourth Proportional to 3,120.32, 4,681.52 and 1,388.96

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Solution

The fourth proportional to 3,120.32, 4,681.52 and 1,388.96 is: 2,083.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.32 : 4,681.52 = 1,388.96 : x
  2. Step 2: Convert to fraction form
    3,120.32/4,681.52 = 1,388.96/x
  3. Step 3: Cross multiply
    3,120.32x = 4,681.52 × 1,388.96
  4. Step 4: Simplify right side
    3,120.32x = 6,502,444.02
  5. Step 5: Solve for x
    x = 6,502,444.02/3,120.32
  6. Step 6: Final answer
    x = 2,083.90

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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.