Home / 776,101.20-1,165,480.20-421,807.20

Finding the Fourth Proportional to 776,101.20, 1,165,480.20 and 421,807.20

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Solution

The fourth proportional to 776,101.20, 1,165,480.20 and 421,807.20 is: 633,432.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,101.20 : 1,165,480.20 = 421,807.20 : x
  2. Step 2: Convert to fraction form
    776,101.20/1,165,480.20 = 421,807.20/x
  3. Step 3: Cross multiply
    776,101.20x = 1,165,480.20 × 421,807.20
  4. Step 4: Simplify right side
    776,101.20x = 491,607,939,817.44
  5. Step 5: Solve for x
    x = 491,607,939,817.44/776,101.20
  6. Step 6: Final answer
    x = 633,432.78

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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.