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Finding the Fourth Proportional to 403,278, 604,917 and 140,622

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Solution

The fourth proportional to 403,278, 604,917 and 140,622 is: 210,933

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,278 : 604,917 = 140,622 : x
  2. Step 2: Convert to fraction form
    403,278/604,917 = 140,622/x
  3. Step 3: Cross multiply
    403,278x = 604,917 × 140,622
  4. Step 4: Simplify right side
    403,278x = 85,064,638,374
  5. Step 5: Solve for x
    x = 85,064,638,374/403,278
  6. Step 6: Final answer
    x = 210,933

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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.