Home / 3,090.88-4,263.20-1,970.66

Finding the Fourth Proportional to 3,090.88, 4,263.20 and 1,970.66

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Solution

The fourth proportional to 3,090.88, 4,263.20 and 1,970.66 is: 2,718.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,090.88 : 4,263.20 = 1,970.66 : x
  2. Step 2: Convert to fraction form
    3,090.88/4,263.20 = 1,970.66/x
  3. Step 3: Cross multiply
    3,090.88x = 4,263.20 × 1,970.66
  4. Step 4: Simplify right side
    3,090.88x = 8,401,317.71
  5. Step 5: Solve for x
    x = 8,401,317.71/3,090.88
  6. Step 6: Final answer
    x = 2,718.10

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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.