Home / 916,940.80-1,375,411.20-285,849.60

Finding the Fourth Proportional to 916,940.80, 1,375,411.20 and 285,849.60

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Solution

The fourth proportional to 916,940.80, 1,375,411.20 and 285,849.60 is: 428,774.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,940.80 : 1,375,411.20 = 285,849.60 : x
  2. Step 2: Convert to fraction form
    916,940.80/1,375,411.20 = 285,849.60/x
  3. Step 3: Cross multiply
    916,940.80x = 1,375,411.20 × 285,849.60
  4. Step 4: Simplify right side
    916,940.80x = 393,160,741,355.52
  5. Step 5: Solve for x
    x = 393,160,741,355.52/916,940.80
  6. Step 6: Final answer
    x = 428,774.40

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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.