Home / 1,915.16-2,642.96-1,216.13

Finding the Fourth Proportional to 1,915.16, 2,642.96 and 1,216.13

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Solution

The fourth proportional to 1,915.16, 2,642.96 and 1,216.13 is: 1,678.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.16 : 2,642.96 = 1,216.13 : x
  2. Step 2: Convert to fraction form
    1,915.16/2,642.96 = 1,216.13/x
  3. Step 3: Cross multiply
    1,915.16x = 2,642.96 × 1,216.13
  4. Step 4: Simplify right side
    1,915.16x = 3,214,172.77
  5. Step 5: Solve for x
    x = 3,214,172.77/1,915.16
  6. Step 6: Final answer
    x = 1,678.28

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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.