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Finding the Fourth Proportional to 639,422, 959,320.96 and 190,146.32

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Solution

The fourth proportional to 639,422, 959,320.96 and 190,146.32 is: 285,275.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,422 : 959,320.96 = 190,146.32 : x
  2. Step 2: Convert to fraction form
    639,422/959,320.96 = 190,146.32/x
  3. Step 3: Cross multiply
    639,422x = 959,320.96 × 190,146.32
  4. Step 4: Simplify right side
    639,422x = 182,411,350,242.87
  5. Step 5: Solve for x
    x = 182,411,350,242.87/639,422
  6. Step 6: Final answer
    x = 285,275.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.