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Finding the Fourth Proportional to 639,008, 881,831.04 and 356,384

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Solution

The fourth proportional to 639,008, 881,831.04 and 356,384 is: 491,809.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,008 : 881,831.04 = 356,384 : x
  2. Step 2: Convert to fraction form
    639,008/881,831.04 = 356,384/x
  3. Step 3: Cross multiply
    639,008x = 881,831.04 × 356,384
  4. Step 4: Simplify right side
    639,008x = 314,270,473,359.36
  5. Step 5: Solve for x
    x = 314,270,473,359.36/639,008
  6. Step 6: Final answer
    x = 491,809.92

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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.