Home / 1,571.85-2,167.39-1,011.55

Finding the Fourth Proportional to 1,571.85, 2,167.39 and 1,011.55

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Solution

The fourth proportional to 1,571.85, 2,167.39 and 1,011.55 is: 1,394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.85 : 2,167.39 = 1,011.55 : x
  2. Step 2: Convert to fraction form
    1,571.85/2,167.39 = 1,011.55/x
  3. Step 3: Cross multiply
    1,571.85x = 2,167.39 × 1,011.55
  4. Step 4: Simplify right side
    1,571.85x = 2,192,423.35
  5. Step 5: Solve for x
    x = 2,192,423.35/1,571.85
  6. Step 6: Final answer
    x = 1,394.80

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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.