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Finding the Fourth Proportional to 479,240.62, 661,233.18 and 315,879.01

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Solution

The fourth proportional to 479,240.62, 661,233.18 and 315,879.01 is: 435,834.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,240.62 : 661,233.18 = 315,879.01 : x
  2. Step 2: Convert to fraction form
    479,240.62/661,233.18 = 315,879.01/x
  3. Step 3: Cross multiply
    479,240.62x = 661,233.18 × 315,879.01
  4. Step 4: Simplify right side
    479,240.62x = 208,869,682,277.55
  5. Step 5: Solve for x
    x = 208,869,682,277.55/479,240.62
  6. Step 6: Final answer
    x = 435,834.68

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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.