Home / 2,138.50-2,953.56-1,438.66

Finding the Fourth Proportional to 2,138.50, 2,953.56 and 1,438.66

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Solution

The fourth proportional to 2,138.50, 2,953.56 and 1,438.66 is: 1,986.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.50 : 2,953.56 = 1,438.66 : x
  2. Step 2: Convert to fraction form
    2,138.50/2,953.56 = 1,438.66/x
  3. Step 3: Cross multiply
    2,138.50x = 2,953.56 × 1,438.66
  4. Step 4: Simplify right side
    2,138.50x = 4,249,168.63
  5. Step 5: Solve for x
    x = 4,249,168.63/2,138.50
  6. Step 6: Final answer
    x = 1,986.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.