Home / 1,915.37-2,643.21-1,118.63

Finding the Fourth Proportional to 1,915.37, 2,643.21 and 1,118.63

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Solution

The fourth proportional to 1,915.37, 2,643.21 and 1,118.63 is: 1,543.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.37 : 2,643.21 = 1,118.63 : x
  2. Step 2: Convert to fraction form
    1,915.37/2,643.21 = 1,118.63/x
  3. Step 3: Cross multiply
    1,915.37x = 2,643.21 × 1,118.63
  4. Step 4: Simplify right side
    1,915.37x = 2,956,780.61
  5. Step 5: Solve for x
    x = 2,956,780.61/1,915.37
  6. Step 6: Final answer
    x = 1,543.71

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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.