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Finding the Fourth Proportional to 386,702.91, 533,653.67 and 216,940.68

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Solution

The fourth proportional to 386,702.91, 533,653.67 and 216,940.68 is: 299,380.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,702.91 : 533,653.67 = 216,940.68 : x
  2. Step 2: Convert to fraction form
    386,702.91/533,653.67 = 216,940.68/x
  3. Step 3: Cross multiply
    386,702.91x = 533,653.67 × 216,940.68
  4. Step 4: Simplify right side
    386,702.91x = 115,771,188,969.59
  5. Step 5: Solve for x
    x = 115,771,188,969.59/386,702.91
  6. Step 6: Final answer
    x = 299,380.19

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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.