Home / 1,258.32-1,886.30-928.45

Finding the Fourth Proportional to 1,258.32, 1,886.30 and 928.45

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Solution

The fourth proportional to 1,258.32, 1,886.30 and 928.45 is: 1,391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.32 : 1,886.30 = 928.45 : x
  2. Step 2: Convert to fraction form
    1,258.32/1,886.30 = 928.45/x
  3. Step 3: Cross multiply
    1,258.32x = 1,886.30 × 928.45
  4. Step 4: Simplify right side
    1,258.32x = 1,751,335.24
  5. Step 5: Solve for x
    x = 1,751,335.24/1,258.32
  6. Step 6: Final answer
    x = 1,391.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.