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Finding the Fourth Proportional to 638,886.88, 881,632.11 and 352,399.60

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Solution

The fourth proportional to 638,886.88, 881,632.11 and 352,399.60 is: 486,293.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,886.88 : 881,632.11 = 352,399.60 : x
  2. Step 2: Convert to fraction form
    638,886.88/881,632.11 = 352,399.60/x
  3. Step 3: Cross multiply
    638,886.88x = 881,632.11 × 352,399.60
  4. Step 4: Simplify right side
    638,886.88x = 310,686,802,911.16
  5. Step 5: Solve for x
    x = 310,686,802,911.16/638,886.88
  6. Step 6: Final answer
    x = 486,293.92

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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.