Home / 432,020.77-647,974.25-128,408.45

Finding the Fourth Proportional to 432,020.77, 647,974.25 and 128,408.45

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Solution

The fourth proportional to 432,020.77, 647,974.25 and 128,408.45 is: 192,595.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,020.77 : 647,974.25 = 128,408.45 : x
  2. Step 2: Convert to fraction form
    432,020.77/647,974.25 = 128,408.45/x
  3. Step 3: Cross multiply
    432,020.77x = 647,974.25 × 128,408.45
  4. Step 4: Simplify right side
    432,020.77x = 83,205,365,842.54
  5. Step 5: Solve for x
    x = 83,205,365,842.54/432,020.77
  6. Step 6: Final answer
    x = 192,595.76

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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.