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Finding the Fourth Proportional to 324,649.18, 486,973.77 and 87,991.86

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Solution

The fourth proportional to 324,649.18, 486,973.77 and 87,991.86 is: 131,987.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,649.18 : 486,973.77 = 87,991.86 : x
  2. Step 2: Convert to fraction form
    324,649.18/486,973.77 = 87,991.86/x
  3. Step 3: Cross multiply
    324,649.18x = 486,973.77 × 87,991.86
  4. Step 4: Simplify right side
    324,649.18x = 42,849,727,793.51
  5. Step 5: Solve for x
    x = 42,849,727,793.51/324,649.18
  6. Step 6: Final answer
    x = 131,987.79

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Similar ratio
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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.