Home / 680,620.37-1,020,930.86-280,821.71

Finding the Fourth Proportional to 680,620.37, 1,020,930.86 and 280,821.71

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Solution

The fourth proportional to 680,620.37, 1,020,930.86 and 280,821.71 is: 421,232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,620.37 : 1,020,930.86 = 280,821.71 : x
  2. Step 2: Convert to fraction form
    680,620.37/1,020,930.86 = 280,821.71/x
  3. Step 3: Cross multiply
    680,620.37x = 1,020,930.86 × 280,821.71
  4. Step 4: Simplify right side
    680,620.37x = 286,699,553,151.35
  5. Step 5: Solve for x
    x = 286,699,553,151.35/680,620.37
  6. Step 6: Final answer
    x = 421,232.70

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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.