Home / 680,486.20-1,020,729.30-280,921.30

Finding the Fourth Proportional to 680,486.20, 1,020,729.30 and 280,921.30

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Solution

The fourth proportional to 680,486.20, 1,020,729.30 and 280,921.30 is: 421,381.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,486.20 : 1,020,729.30 = 280,921.30 : x
  2. Step 2: Convert to fraction form
    680,486.20/1,020,729.30 = 280,921.30/x
  3. Step 3: Cross multiply
    680,486.20x = 1,020,729.30 × 280,921.30
  4. Step 4: Simplify right side
    680,486.20x = 286,744,601,904.09
  5. Step 5: Solve for x
    x = 286,744,601,904.09/680,486.20
  6. Step 6: Final answer
    x = 421,381.95

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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.