Home / 1,862.70-2,566.47-1,390.41

Finding the Fourth Proportional to 1,862.70, 2,566.47 and 1,390.41

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Solution

The fourth proportional to 1,862.70, 2,566.47 and 1,390.41 is: 1,915.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,862.70 : 2,566.47 = 1,390.41 : x
  2. Step 2: Convert to fraction form
    1,862.70/2,566.47 = 1,390.41/x
  3. Step 3: Cross multiply
    1,862.70x = 2,566.47 × 1,390.41
  4. Step 4: Simplify right side
    1,862.70x = 3,568,445.55
  5. Step 5: Solve for x
    x = 3,568,445.55/1,862.70
  6. Step 6: Final answer
    x = 1,915.74

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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.