Home / 638,425.98-881,030.52-351,939.78

Finding the Fourth Proportional to 638,425.98, 881,030.52 and 351,939.78

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Solution

The fourth proportional to 638,425.98, 881,030.52 and 351,939.78 is: 485,678.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,425.98 : 881,030.52 = 351,939.78 : x
  2. Step 2: Convert to fraction form
    638,425.98/881,030.52 = 351,939.78/x
  3. Step 3: Cross multiply
    638,425.98x = 881,030.52 × 351,939.78
  4. Step 4: Simplify right side
    638,425.98x = 310,069,687,382.09
  5. Step 5: Solve for x
    x = 310,069,687,382.09/638,425.98
  6. Step 6: Final answer
    x = 485,678.37

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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.