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Finding the Fourth Proportional to 667,410.45, 921,026.06 and 361,486.74

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Solution

The fourth proportional to 667,410.45, 921,026.06 and 361,486.74 is: 498,851.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,410.45 : 921,026.06 = 361,486.74 : x
  2. Step 2: Convert to fraction form
    667,410.45/921,026.06 = 361,486.74/x
  3. Step 3: Cross multiply
    667,410.45x = 921,026.06 × 361,486.74
  4. Step 4: Simplify right side
    667,410.45x = 332,938,706,077.01
  5. Step 5: Solve for x
    x = 332,938,706,077.01/667,410.45
  6. Step 6: Final answer
    x = 498,851.50

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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.