Home / 1,915.57-2,643.08-1,253.39

Finding the Fourth Proportional to 1,915.57, 2,643.08 and 1,253.39

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Solution

The fourth proportional to 1,915.57, 2,643.08 and 1,253.39 is: 1,729.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.57 : 2,643.08 = 1,253.39 : x
  2. Step 2: Convert to fraction form
    1,915.57/2,643.08 = 1,253.39/x
  3. Step 3: Cross multiply
    1,915.57x = 2,643.08 × 1,253.39
  4. Step 4: Simplify right side
    1,915.57x = 3,312,803.77
  5. Step 5: Solve for x
    x = 3,312,803.77/1,915.57
  6. Step 6: Final answer
    x = 1,729.41

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1.5x scale

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.