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Finding the Fourth Proportional to 1,905,402.91, 2,858,665.83 and 767,579.61

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Solution

The fourth proportional to 1,905,402.91, 2,858,665.83 and 767,579.61 is: 1,151,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905,402.91 : 2,858,665.83 = 767,579.61 : x
  2. Step 2: Convert to fraction form
    1,905,402.91/2,858,665.83 = 767,579.61/x
  3. Step 3: Cross multiply
    1,905,402.91x = 2,858,665.83 × 767,579.61
  4. Step 4: Simplify right side
    1,905,402.91x = 2,194,253,602,911.73
  5. Step 5: Solve for x
    x = 2,194,253,602,911.73/1,905,402.91
  6. Step 6: Final answer
    x = 1,151,595.60

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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.