Home / 638,422.56-881,019.99-351,941.76

Finding the Fourth Proportional to 638,422.56, 881,019.99 and 351,941.76

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Solution

The fourth proportional to 638,422.56, 881,019.99 and 351,941.76 is: 485,677.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,422.56 : 881,019.99 = 351,941.76 : x
  2. Step 2: Convert to fraction form
    638,422.56/881,019.99 = 351,941.76/x
  3. Step 3: Cross multiply
    638,422.56x = 881,019.99 × 351,941.76
  4. Step 4: Simplify right side
    638,422.56x = 310,067,725,875.78
  5. Step 5: Solve for x
    x = 310,067,725,875.78/638,422.56
  6. Step 6: Final answer
    x = 485,677.90

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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.