Home / 279,789.12-386,109-152,464.68

Finding the Fourth Proportional to 279,789.12, 386,109 and 152,464.68

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Solution

The fourth proportional to 279,789.12, 386,109 and 152,464.68 is: 210,401.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,789.12 : 386,109 = 152,464.68 : x
  2. Step 2: Convert to fraction form
    279,789.12/386,109 = 152,464.68/x
  3. Step 3: Cross multiply
    279,789.12x = 386,109 × 152,464.68
  4. Step 4: Simplify right side
    279,789.12x = 58,867,985,130.12
  5. Step 5: Solve for x
    x = 58,867,985,130.12/279,789.12
  6. Step 6: Final answer
    x = 210,401.27

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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.