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Finding the Fourth Proportional to 290,308.82, 400,615.89 and 162,989.78

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Solution

The fourth proportional to 290,308.82, 400,615.89 and 162,989.78 is: 224,920.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,308.82 : 400,615.89 = 162,989.78 : x
  2. Step 2: Convert to fraction form
    290,308.82/400,615.89 = 162,989.78/x
  3. Step 3: Cross multiply
    290,308.82x = 400,615.89 × 162,989.78
  4. Step 4: Simplify right side
    290,308.82x = 65,296,295,775.60
  5. Step 5: Solve for x
    x = 65,296,295,775.60/290,308.82
  6. Step 6: Final answer
    x = 224,920.12

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1.5x scale

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.