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Finding the Fourth Proportional to 490,172.30, 676,424.26 and 272,375.34

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Solution

The fourth proportional to 490,172.30, 676,424.26 and 272,375.34 is: 375,870.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,172.30 : 676,424.26 = 272,375.34 : x
  2. Step 2: Convert to fraction form
    490,172.30/676,424.26 = 272,375.34/x
  3. Step 3: Cross multiply
    490,172.30x = 676,424.26 × 272,375.34
  4. Step 4: Simplify right side
    490,172.30x = 184,241,287,801.75
  5. Step 5: Solve for x
    x = 184,241,287,801.75/490,172.30
  6. Step 6: Final answer
    x = 375,870.46

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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.