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Finding the Fourth Proportional to 720,163.93, 993,814.47 and 393,469.91

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Solution

The fourth proportional to 720,163.93, 993,814.47 and 393,469.91 is: 542,982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,163.93 : 993,814.47 = 393,469.91 : x
  2. Step 2: Convert to fraction form
    720,163.93/993,814.47 = 393,469.91/x
  3. Step 3: Cross multiply
    720,163.93x = 993,814.47 × 393,469.91
  4. Step 4: Simplify right side
    720,163.93x = 391,036,091,435.99
  5. Step 5: Solve for x
    x = 391,036,091,435.99/720,163.93
  6. Step 6: Final answer
    x = 542,982.05

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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.