Home / 1,420.88-2,118.85-1,315.04

Finding the Fourth Proportional to 1,420.88, 2,118.85 and 1,315.04

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Solution

The fourth proportional to 1,420.88, 2,118.85 and 1,315.04 is: 1,961.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.88 : 2,118.85 = 1,315.04 : x
  2. Step 2: Convert to fraction form
    1,420.88/2,118.85 = 1,315.04/x
  3. Step 3: Cross multiply
    1,420.88x = 2,118.85 × 1,315.04
  4. Step 4: Simplify right side
    1,420.88x = 2,786,372.50
  5. Step 5: Solve for x
    x = 2,786,372.50/1,420.88
  6. Step 6: Final answer
    x = 1,961.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.