Home / 680,551.20-1,021,215.60-260,128.80

Finding the Fourth Proportional to 680,551.20, 1,021,215.60 and 260,128.80

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Solution

The fourth proportional to 680,551.20, 1,021,215.60 and 260,128.80 is: 390,341.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,551.20 : 1,021,215.60 = 260,128.80 : x
  2. Step 2: Convert to fraction form
    680,551.20/1,021,215.60 = 260,128.80/x
  3. Step 3: Cross multiply
    680,551.20x = 1,021,215.60 × 260,128.80
  4. Step 4: Simplify right side
    680,551.20x = 265,647,588,569.28
  5. Step 5: Solve for x
    x = 265,647,588,569.28/680,551.20
  6. Step 6: Final answer
    x = 390,341.81

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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.