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Finding the Fourth Proportional to 399,393.60, 550,850.67 and 256,166.70

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Solution

The fourth proportional to 399,393.60, 550,850.67 and 256,166.70 is: 353,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,393.60 : 550,850.67 = 256,166.70 : x
  2. Step 2: Convert to fraction form
    399,393.60/550,850.67 = 256,166.70/x
  3. Step 3: Cross multiply
    399,393.60x = 550,850.67 × 256,166.70
  4. Step 4: Simplify right side
    399,393.60x = 141,109,598,326.69
  5. Step 5: Solve for x
    x = 141,109,598,326.69/399,393.60
  6. Step 6: Final answer
    x = 353,309.61

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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.