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Finding the Fourth Proportional to 631,326.44, 870,953.07 and 386,322.86

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Solution

The fourth proportional to 631,326.44, 870,953.07 and 386,322.86 is: 532,955.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,326.44 : 870,953.07 = 386,322.86 : x
  2. Step 2: Convert to fraction form
    631,326.44/870,953.07 = 386,322.86/x
  3. Step 3: Cross multiply
    631,326.44x = 870,953.07 × 386,322.86
  4. Step 4: Simplify right side
    631,326.44x = 336,469,076,573.42
  5. Step 5: Solve for x
    x = 336,469,076,573.42/631,326.44
  6. Step 6: Final answer
    x = 532,955.79

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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.