Home / 1,536.25-2,120.09-915.61

Finding the Fourth Proportional to 1,536.25, 2,120.09 and 915.61

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Solution

The fourth proportional to 1,536.25, 2,120.09 and 915.61 is: 1,263.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.25 : 2,120.09 = 915.61 : x
  2. Step 2: Convert to fraction form
    1,536.25/2,120.09 = 915.61/x
  3. Step 3: Cross multiply
    1,536.25x = 2,120.09 × 915.61
  4. Step 4: Simplify right side
    1,536.25x = 1,941,175.60
  5. Step 5: Solve for x
    x = 1,941,175.60/1,536.25
  6. Step 6: Final answer
    x = 1,263.58

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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.