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Finding the Fourth Proportional to 720,199.62, 993,790.76 and 397,890.50

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Solution

The fourth proportional to 720,199.62, 993,790.76 and 397,890.50 is: 549,042.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,199.62 : 993,790.76 = 397,890.50 : x
  2. Step 2: Convert to fraction form
    720,199.62/993,790.76 = 397,890.50/x
  3. Step 3: Cross multiply
    720,199.62x = 993,790.76 × 397,890.50
  4. Step 4: Simplify right side
    720,199.62x = 395,419,895,433.37
  5. Step 5: Solve for x
    x = 395,419,895,433.37/720,199.62
  6. Step 6: Final answer
    x = 549,042.08

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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.