Home / 638,928.54-881,721.45-352,449.36

Finding the Fourth Proportional to 638,928.54, 881,721.45 and 352,449.36

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Solution

The fourth proportional to 638,928.54, 881,721.45 and 352,449.36 is: 486,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,928.54 : 881,721.45 = 352,449.36 : x
  2. Step 2: Convert to fraction form
    638,928.54/881,721.45 = 352,449.36/x
  3. Step 3: Cross multiply
    638,928.54x = 881,721.45 × 352,449.36
  4. Step 4: Simplify right side
    638,928.54x = 310,762,160,750.77
  5. Step 5: Solve for x
    x = 310,762,160,750.77/638,928.54
  6. Step 6: Final answer
    x = 486,380.15

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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.