Home / 1,575.24-2,173.78-912.07

Finding the Fourth Proportional to 1,575.24, 2,173.78 and 912.07

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Solution

The fourth proportional to 1,575.24, 2,173.78 and 912.07 is: 1,258.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.24 : 2,173.78 = 912.07 : x
  2. Step 2: Convert to fraction form
    1,575.24/2,173.78 = 912.07/x
  3. Step 3: Cross multiply
    1,575.24x = 2,173.78 × 912.07
  4. Step 4: Simplify right side
    1,575.24x = 1,982,639.52
  5. Step 5: Solve for x
    x = 1,982,639.52/1,575.24
  6. Step 6: Final answer
    x = 1,258.63

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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.