Home / 680,619.48-1,020,929.34-280,821

Finding the Fourth Proportional to 680,619.48, 1,020,929.34 and 280,821

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Solution

The fourth proportional to 680,619.48, 1,020,929.34 and 280,821 is: 421,231.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,619.48 : 1,020,929.34 = 280,821 : x
  2. Step 2: Convert to fraction form
    680,619.48/1,020,929.34 = 280,821/x
  3. Step 3: Cross multiply
    680,619.48x = 1,020,929.34 × 280,821
  4. Step 4: Simplify right side
    680,619.48x = 286,698,398,188.14
  5. Step 5: Solve for x
    x = 286,698,398,188.14/680,619.48
  6. Step 6: Final answer
    x = 421,231.55

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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.