Home / 769,517.21-1,061,915.15-420,642.11

Finding the Fourth Proportional to 769,517.21, 1,061,915.15 and 420,642.11

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Solution

The fourth proportional to 769,517.21, 1,061,915.15 and 420,642.11 is: 580,475.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,517.21 : 1,061,915.15 = 420,642.11 : x
  2. Step 2: Convert to fraction form
    769,517.21/1,061,915.15 = 420,642.11/x
  3. Step 3: Cross multiply
    769,517.21x = 1,061,915.15 × 420,642.11
  4. Step 4: Simplify right side
    769,517.21x = 446,686,221,924.18
  5. Step 5: Solve for x
    x = 446,686,221,924.18/769,517.21
  6. Step 6: Final answer
    x = 580,475.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.