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Finding the Fourth Proportional to 981,495.72, 1,471,640.49 and 381,757.77

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Solution

The fourth proportional to 981,495.72, 1,471,640.49 and 381,757.77 is: 572,402.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,495.72 : 1,471,640.49 = 381,757.77 : x
  2. Step 2: Convert to fraction form
    981,495.72/1,471,640.49 = 381,757.77/x
  3. Step 3: Cross multiply
    981,495.72x = 1,471,640.49 × 381,757.77
  4. Step 4: Simplify right side
    981,495.72x = 561,810,191,704.11
  5. Step 5: Solve for x
    x = 561,810,191,704.11/981,495.72
  6. Step 6: Final answer
    x = 572,402.08

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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.