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Finding the Fourth Proportional to 378,425.27, 567,715.77 and 153,785.21

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Solution

The fourth proportional to 378,425.27, 567,715.77 and 153,785.21 is: 230,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,425.27 : 567,715.77 = 153,785.21 : x
  2. Step 2: Convert to fraction form
    378,425.27/567,715.77 = 153,785.21/x
  3. Step 3: Cross multiply
    378,425.27x = 567,715.77 × 153,785.21
  4. Step 4: Simplify right side
    378,425.27x = 87,306,286,071.18
  5. Step 5: Solve for x
    x = 87,306,286,071.18/378,425.27
  6. Step 6: Final answer
    x = 230,709.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.