Home / 1,220,944,989.88-1,684,904,915.69-685,022,672.17

Finding the Fourth Proportional to 1,220,944,989.88, 1,684,904,915.69 and 685,022,672.17

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Solution

The fourth proportional to 1,220,944,989.88, 1,684,904,915.69 and 685,022,672.17 is: 945,331,753.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,944,989.88 : 1,684,904,915.69 = 685,022,672.17 : x
  2. Step 2: Convert to fraction form
    1,220,944,989.88/1,684,904,915.69 = 685,022,672.17/x
  3. Step 3: Cross multiply
    1,220,944,989.88x = 1,684,904,915.69 × 685,022,672.17
  4. Step 4: Simplify right side
    1,220,944,989.88x = 1,154,198,067,698,332,416
  5. Step 5: Solve for x
    x = 1,154,198,067,698,332,416/1,220,944,989.88
  6. Step 6: Final answer
    x = 945,331,753.08

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Double scale
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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.