Home / 680,610.39-1,020,915.93-280,811.76

Finding the Fourth Proportional to 680,610.39, 1,020,915.93 and 280,811.76

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Solution

The fourth proportional to 680,610.39, 1,020,915.93 and 280,811.76 is: 421,217.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,610.39 : 1,020,915.93 = 280,811.76 : x
  2. Step 2: Convert to fraction form
    680,610.39/1,020,915.93 = 280,811.76/x
  3. Step 3: Cross multiply
    680,610.39x = 1,020,915.93 × 280,811.76
  4. Step 4: Simplify right side
    680,610.39x = 286,685,199,115.34
  5. Step 5: Solve for x
    x = 286,685,199,115.34/680,610.39
  6. Step 6: Final answer
    x = 421,217.78

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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.