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Finding the Fourth Proportional to 638,447.68, 881,063.76 and 351,978.04

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Solution

The fourth proportional to 638,447.68, 881,063.76 and 351,978.04 is: 485,732.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,447.68 : 881,063.76 = 351,978.04 : x
  2. Step 2: Convert to fraction form
    638,447.68/881,063.76 = 351,978.04/x
  3. Step 3: Cross multiply
    638,447.68x = 881,063.76 × 351,978.04
  4. Step 4: Simplify right side
    638,447.68x = 310,115,095,359.83
  5. Step 5: Solve for x
    x = 310,115,095,359.83/638,447.68
  6. Step 6: Final answer
    x = 485,732.98

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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.