Home / 1,575.32-2,173.55-912.06

Finding the Fourth Proportional to 1,575.32, 2,173.55 and 912.06

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Solution

The fourth proportional to 1,575.32, 2,173.55 and 912.06 is: 1,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.32 : 2,173.55 = 912.06 : x
  2. Step 2: Convert to fraction form
    1,575.32/2,173.55 = 912.06/x
  3. Step 3: Cross multiply
    1,575.32x = 2,173.55 × 912.06
  4. Step 4: Simplify right side
    1,575.32x = 1,982,403.45
  5. Step 5: Solve for x
    x = 1,982,403.45/1,575.32
  6. Step 6: Final answer
    x = 1,258.42

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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.