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Finding the Fourth Proportional to 720,191.93, 993,780.16 and 397,882.81

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Solution

The fourth proportional to 720,191.93, 993,780.16 and 397,882.81 is: 549,031.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,191.93 : 993,780.16 = 397,882.81 : x
  2. Step 2: Convert to fraction form
    720,191.93/993,780.16 = 397,882.81/x
  3. Step 3: Cross multiply
    720,191.93x = 993,780.16 × 397,882.81
  4. Step 4: Simplify right side
    720,191.93x = 395,408,039,103.89
  5. Step 5: Solve for x
    x = 395,408,039,103.89/720,191.93
  6. Step 6: Final answer
    x = 549,031.48

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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.