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Finding the Fourth Proportional to 339,884.64, 469,169.28 and 291,945.60

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Solution

The fourth proportional to 339,884.64, 469,169.28 and 291,945.60 is: 402,995.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,884.64 : 469,169.28 = 291,945.60 : x
  2. Step 2: Convert to fraction form
    339,884.64/469,169.28 = 291,945.60/x
  3. Step 3: Cross multiply
    339,884.64x = 469,169.28 × 291,945.60
  4. Step 4: Simplify right side
    339,884.64x = 136,971,906,951.17
  5. Step 5: Solve for x
    x = 136,971,906,951.17/339,884.64
  6. Step 6: Final answer
    x = 402,995.28

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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.