Home / 258,390.32-356,608.20-143,680.40

Finding the Fourth Proportional to 258,390.32, 356,608.20 and 143,680.40

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Solution

The fourth proportional to 258,390.32, 356,608.20 and 143,680.40 is: 198,295.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,390.32 : 356,608.20 = 143,680.40 : x
  2. Step 2: Convert to fraction form
    258,390.32/356,608.20 = 143,680.40/x
  3. Step 3: Cross multiply
    258,390.32x = 356,608.20 × 143,680.40
  4. Step 4: Simplify right side
    258,390.32x = 51,237,608,819.28
  5. Step 5: Solve for x
    x = 51,237,608,819.28/258,390.32
  6. Step 6: Final answer
    x = 198,295.39

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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.