Home / 870,821.25-1,306,245.72-331,085.76

Finding the Fourth Proportional to 870,821.25, 1,306,245.72 and 331,085.76

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Solution

The fourth proportional to 870,821.25, 1,306,245.72 and 331,085.76 is: 496,633.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,821.25 : 1,306,245.72 = 331,085.76 : x
  2. Step 2: Convert to fraction form
    870,821.25/1,306,245.72 = 331,085.76/x
  3. Step 3: Cross multiply
    870,821.25x = 1,306,245.72 × 331,085.76
  4. Step 4: Simplify right side
    870,821.25x = 432,479,356,952.95
  5. Step 5: Solve for x
    x = 432,479,356,952.95/870,821.25
  6. Step 6: Final answer
    x = 496,633.90

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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.