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Finding the Fourth Proportional to 399,086.76, 550,751.31 and 217,810.32

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Solution

The fourth proportional to 399,086.76, 550,751.31 and 217,810.32 is: 300,584.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,086.76 : 550,751.31 = 217,810.32 : x
  2. Step 2: Convert to fraction form
    399,086.76/550,751.31 = 217,810.32/x
  3. Step 3: Cross multiply
    399,086.76x = 550,751.31 × 217,810.32
  4. Step 4: Simplify right side
    399,086.76x = 119,959,319,071.52
  5. Step 5: Solve for x
    x = 119,959,319,071.52/399,086.76
  6. Step 6: Final answer
    x = 300,584.56

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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.