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Finding the Fourth Proportional to 386,694.50, 533,631.86 and 216,924.98

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Solution

The fourth proportional to 386,694.50, 533,631.86 and 216,924.98 is: 299,352.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,694.50 : 533,631.86 = 216,924.98 : x
  2. Step 2: Convert to fraction form
    386,694.50/533,631.86 = 216,924.98/x
  3. Step 3: Cross multiply
    386,694.50x = 533,631.86 × 216,924.98
  4. Step 4: Simplify right side
    386,694.50x = 115,758,080,557.86
  5. Step 5: Solve for x
    x = 115,758,080,557.86/386,694.50
  6. Step 6: Final answer
    x = 299,352.80

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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.