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Finding the Fourth Proportional to 1,551.37, 2,140.95 and 852.75

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Solution

The fourth proportional to 1,551.37, 2,140.95 and 852.75 is: 1,176.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.37 : 2,140.95 = 852.75 : x
  2. Step 2: Convert to fraction form
    1,551.37/2,140.95 = 852.75/x
  3. Step 3: Cross multiply
    1,551.37x = 2,140.95 × 852.75
  4. Step 4: Simplify right side
    1,551.37x = 1,825,690.85
  5. Step 5: Solve for x
    x = 1,825,690.85/1,551.37
  6. Step 6: Final answer
    x = 1,176.82

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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.