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Finding the Fourth Proportional to 378,728.53, 522,834.76 and 235,534.71

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Solution

The fourth proportional to 378,728.53, 522,834.76 and 235,534.71 is: 325,155.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,728.53 : 522,834.76 = 235,534.71 : x
  2. Step 2: Convert to fraction form
    378,728.53/522,834.76 = 235,534.71/x
  3. Step 3: Cross multiply
    378,728.53x = 522,834.76 × 235,534.71
  4. Step 4: Simplify right side
    378,728.53x = 123,145,733,574.52
  5. Step 5: Solve for x
    x = 123,145,733,574.52/378,728.53
  6. Step 6: Final answer
    x = 325,155.68

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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.