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Finding the Fourth Proportional to 667,508.03, 921,162.14 and 395,709.49

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Solution

The fourth proportional to 667,508.03, 921,162.14 and 395,709.49 is: 546,079.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,508.03 : 921,162.14 = 395,709.49 : x
  2. Step 2: Convert to fraction form
    667,508.03/921,162.14 = 395,709.49/x
  3. Step 3: Cross multiply
    667,508.03x = 921,162.14 × 395,709.49
  4. Step 4: Simplify right side
    667,508.03x = 364,512,600,626.71
  5. Step 5: Solve for x
    x = 364,512,600,626.71/667,508.03
  6. Step 6: Final answer
    x = 546,079.72

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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.