Home / 721,248.96-995,315.04-398,933.76

Finding the Fourth Proportional to 721,248.96, 995,315.04 and 398,933.76

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Solution

The fourth proportional to 721,248.96, 995,315.04 and 398,933.76 is: 550,523.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,248.96 : 995,315.04 = 398,933.76 : x
  2. Step 2: Convert to fraction form
    721,248.96/995,315.04 = 398,933.76/x
  3. Step 3: Cross multiply
    721,248.96x = 995,315.04 × 398,933.76
  4. Step 4: Simplify right side
    721,248.96x = 397,064,771,291.75
  5. Step 5: Solve for x
    x = 397,064,771,291.75/721,248.96
  6. Step 6: Final answer
    x = 550,523.87

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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.