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Finding the Fourth Proportional to 2,955.70, 4,438.35 and 2,139.70

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Solution

The fourth proportional to 2,955.70, 4,438.35 and 2,139.70 is: 3,213.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,955.70 : 4,438.35 = 2,139.70 : x
  2. Step 2: Convert to fraction form
    2,955.70/4,438.35 = 2,139.70/x
  3. Step 3: Cross multiply
    2,955.70x = 4,438.35 × 2,139.70
  4. Step 4: Simplify right side
    2,955.70x = 9,496,737.50
  5. Step 5: Solve for x
    x = 9,496,737.50/2,955.70
  6. Step 6: Final answer
    x = 3,213.02

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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.