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Finding the Fourth Proportional to 870,391.86, 1,305,959.31 and 491,596.98

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Solution

The fourth proportional to 870,391.86, 1,305,959.31 and 491,596.98 is: 737,605.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,391.86 : 1,305,959.31 = 491,596.98 : x
  2. Step 2: Convert to fraction form
    870,391.86/1,305,959.31 = 491,596.98/x
  3. Step 3: Cross multiply
    870,391.86x = 1,305,959.31 × 491,596.98
  4. Step 4: Simplify right side
    870,391.86x = 642,005,652,798.88
  5. Step 5: Solve for x
    x = 642,005,652,798.88/870,391.86
  6. Step 6: Final answer
    x = 737,605.30

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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.