Home / 2,165.02-2,988.66-1,280.85

Finding the Fourth Proportional to 2,165.02, 2,988.66 and 1,280.85

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Solution

The fourth proportional to 2,165.02, 2,988.66 and 1,280.85 is: 1,768.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.02 : 2,988.66 = 1,280.85 : x
  2. Step 2: Convert to fraction form
    2,165.02/2,988.66 = 1,280.85/x
  3. Step 3: Cross multiply
    2,165.02x = 2,988.66 × 1,280.85
  4. Step 4: Simplify right side
    2,165.02x = 3,828,025.16
  5. Step 5: Solve for x
    x = 3,828,025.16/2,165.02
  6. Step 6: Final answer
    x = 1,768.12

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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.