Home / 1,915.85-2,643.18-1,253.08

Finding the Fourth Proportional to 1,915.85, 2,643.18 and 1,253.08

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Solution

The fourth proportional to 1,915.85, 2,643.18 and 1,253.08 is: 1,728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.85 : 2,643.18 = 1,253.08 : x
  2. Step 2: Convert to fraction form
    1,915.85/2,643.18 = 1,253.08/x
  3. Step 3: Cross multiply
    1,915.85x = 2,643.18 × 1,253.08
  4. Step 4: Simplify right side
    1,915.85x = 3,312,115.99
  5. Step 5: Solve for x
    x = 3,312,115.99/1,915.85
  6. Step 6: Final answer
    x = 1,728.80

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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.