Home / 1,220,915.16-1,684,518.66-961,989.12

Finding the Fourth Proportional to 1,220,915.16, 1,684,518.66 and 961,989.12

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Solution

The fourth proportional to 1,220,915.16, 1,684,518.66 and 961,989.12 is: 1,327,273.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,915.16 : 1,684,518.66 = 961,989.12 : x
  2. Step 2: Convert to fraction form
    1,220,915.16/1,684,518.66 = 961,989.12/x
  3. Step 3: Cross multiply
    1,220,915.16x = 1,684,518.66 × 961,989.12
  4. Step 4: Simplify right side
    1,220,915.16x = 1,620,488,623,356.98
  5. Step 5: Solve for x
    x = 1,620,488,623,356.98/1,220,915.16
  6. Step 6: Final answer
    x = 1,327,273.73

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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.