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Finding the Fourth Proportional to 386,640.69, 533,798.88 and 300,436.85

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Solution

The fourth proportional to 386,640.69, 533,798.88 and 300,436.85 is: 414,785.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,640.69 : 533,798.88 = 300,436.85 : x
  2. Step 2: Convert to fraction form
    386,640.69/533,798.88 = 300,436.85/x
  3. Step 3: Cross multiply
    386,640.69x = 533,798.88 × 300,436.85
  4. Step 4: Simplify right side
    386,640.69x = 160,372,851,371.73
  5. Step 5: Solve for x
    x = 160,372,851,371.73/386,640.69
  6. Step 6: Final answer
    x = 414,785.24

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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.