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Finding the Fourth Proportional to 865,647.76, 1,295,223.92 and 715,958.56

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Solution

The fourth proportional to 865,647.76, 1,295,223.92 and 715,958.56 is: 1,071,251.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,647.76 : 1,295,223.92 = 715,958.56 : x
  2. Step 2: Convert to fraction form
    865,647.76/1,295,223.92 = 715,958.56/x
  3. Step 3: Cross multiply
    865,647.76x = 1,295,223.92 × 715,958.56
  4. Step 4: Simplify right side
    865,647.76x = 927,326,652,640.76
  5. Step 5: Solve for x
    x = 927,326,652,640.76/865,647.76
  6. Step 6: Final answer
    x = 1,071,251.72

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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.