Home / 1,635.20-2,256.90-1,045.70

Finding the Fourth Proportional to 1,635.20, 2,256.90 and 1,045.70

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Solution

The fourth proportional to 1,635.20, 2,256.90 and 1,045.70 is: 1,443.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.20 : 2,256.90 = 1,045.70 : x
  2. Step 2: Convert to fraction form
    1,635.20/2,256.90 = 1,045.70/x
  3. Step 3: Cross multiply
    1,635.20x = 2,256.90 × 1,045.70
  4. Step 4: Simplify right side
    1,635.20x = 2,360,040.33
  5. Step 5: Solve for x
    x = 2,360,040.33/1,635.20
  6. Step 6: Final answer
    x = 1,443.27

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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.