Home / 3,438.60-5,155.62-1,247.35

Finding the Fourth Proportional to 3,438.60, 5,155.62 and 1,247.35

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Solution

The fourth proportional to 3,438.60, 5,155.62 and 1,247.35 is: 1,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.60 : 5,155.62 = 1,247.35 : x
  2. Step 2: Convert to fraction form
    3,438.60/5,155.62 = 1,247.35/x
  3. Step 3: Cross multiply
    3,438.60x = 5,155.62 × 1,247.35
  4. Step 4: Simplify right side
    3,438.60x = 6,430,865.23
  5. Step 5: Solve for x
    x = 6,430,865.23/3,438.60
  6. Step 6: Final answer
    x = 1,870.20

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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.