Home / 776,078.20-1,165,445.70-421,784.20

Finding the Fourth Proportional to 776,078.20, 1,165,445.70 and 421,784.20

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Solution

The fourth proportional to 776,078.20, 1,165,445.70 and 421,784.20 is: 633,398.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,078.20 : 1,165,445.70 = 421,784.20 : x
  2. Step 2: Convert to fraction form
    776,078.20/1,165,445.70 = 421,784.20/x
  3. Step 3: Cross multiply
    776,078.20x = 1,165,445.70 × 421,784.20
  4. Step 4: Simplify right side
    776,078.20x = 491,566,582,217.94
  5. Step 5: Solve for x
    x = 491,566,582,217.94/776,078.20
  6. Step 6: Final answer
    x = 633,398.26

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1.5x scale

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.