Home / 1,915.59-2,643.54-1,129.63

Finding the Fourth Proportional to 1,915.59, 2,643.54 and 1,129.63

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Solution

The fourth proportional to 1,915.59, 2,643.54 and 1,129.63 is: 1,558.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.59 : 2,643.54 = 1,129.63 : x
  2. Step 2: Convert to fraction form
    1,915.59/2,643.54 = 1,129.63/x
  3. Step 3: Cross multiply
    1,915.59x = 2,643.54 × 1,129.63
  4. Step 4: Simplify right side
    1,915.59x = 2,986,222.09
  5. Step 5: Solve for x
    x = 2,986,222.09/1,915.59
  6. Step 6: Final answer
    x = 1,558.90

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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.