Home / 628,921.44-867,891.36-342,439.20

Finding the Fourth Proportional to 628,921.44, 867,891.36 and 342,439.20

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Solution

The fourth proportional to 628,921.44, 867,891.36 and 342,439.20 is: 472,555.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,921.44 : 867,891.36 = 342,439.20 : x
  2. Step 2: Convert to fraction form
    628,921.44/867,891.36 = 342,439.20/x
  3. Step 3: Cross multiply
    628,921.44x = 867,891.36 × 342,439.20
  4. Step 4: Simplify right side
    628,921.44x = 297,200,023,005.31
  5. Step 5: Solve for x
    x = 297,200,023,005.31/628,921.44
  6. Step 6: Final answer
    x = 472,555.08

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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.