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Finding the Fourth Proportional to 3,246.84, 4,870.80 and 1,399.32

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Solution

The fourth proportional to 3,246.84, 4,870.80 and 1,399.32 is: 2,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,246.84 : 4,870.80 = 1,399.32 : x
  2. Step 2: Convert to fraction form
    3,246.84/4,870.80 = 1,399.32/x
  3. Step 3: Cross multiply
    3,246.84x = 4,870.80 × 1,399.32
  4. Step 4: Simplify right side
    3,246.84x = 6,815,807.86
  5. Step 5: Solve for x
    x = 6,815,807.86/3,246.84
  6. Step 6: Final answer
    x = 2,099.21

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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.