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Finding the Fourth Proportional to 668,892.41, 1,003,491.87 and 289,876.76

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Solution

The fourth proportional to 668,892.41, 1,003,491.87 and 289,876.76 is: 434,881.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,892.41 : 1,003,491.87 = 289,876.76 : x
  2. Step 2: Convert to fraction form
    668,892.41/1,003,491.87 = 289,876.76/x
  3. Step 3: Cross multiply
    668,892.41x = 1,003,491.87 × 289,876.76
  4. Step 4: Simplify right side
    668,892.41x = 290,888,971,961.94
  5. Step 5: Solve for x
    x = 290,888,971,961.94/668,892.41
  6. Step 6: Final answer
    x = 434,881.56

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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.