Home / 2,115.95-2,920.34-1,319.41

Finding the Fourth Proportional to 2,115.95, 2,920.34 and 1,319.41

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Solution

The fourth proportional to 2,115.95, 2,920.34 and 1,319.41 is: 1,820.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.95 : 2,920.34 = 1,319.41 : x
  2. Step 2: Convert to fraction form
    2,115.95/2,920.34 = 1,319.41/x
  3. Step 3: Cross multiply
    2,115.95x = 2,920.34 × 1,319.41
  4. Step 4: Simplify right side
    2,115.95x = 3,853,108.90
  5. Step 5: Solve for x
    x = 3,853,108.90/2,115.95
  6. Step 6: Final answer
    x = 1,820.98

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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.