Home / 856,257.72-1,284,389.64-287,622.60

Finding the Fourth Proportional to 856,257.72, 1,284,389.64 and 287,622.60

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Solution

The fourth proportional to 856,257.72, 1,284,389.64 and 287,622.60 is: 431,434.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,257.72 : 1,284,389.64 = 287,622.60 : x
  2. Step 2: Convert to fraction form
    856,257.72/1,284,389.64 = 287,622.60/x
  3. Step 3: Cross multiply
    856,257.72x = 1,284,389.64 × 287,622.60
  4. Step 4: Simplify right side
    856,257.72x = 369,419,487,669.86
  5. Step 5: Solve for x
    x = 369,419,487,669.86/856,257.72
  6. Step 6: Final answer
    x = 431,434.93

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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.