Home / 2,074.60-3,111.36-688.06

Finding the Fourth Proportional to 2,074.60, 3,111.36 and 688.06

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Solution

The fourth proportional to 2,074.60, 3,111.36 and 688.06 is: 1,031.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.60 : 3,111.36 = 688.06 : x
  2. Step 2: Convert to fraction form
    2,074.60/3,111.36 = 688.06/x
  3. Step 3: Cross multiply
    2,074.60x = 3,111.36 × 688.06
  4. Step 4: Simplify right side
    2,074.60x = 2,140,802.36
  5. Step 5: Solve for x
    x = 2,140,802.36/2,074.60
  6. Step 6: Final answer
    x = 1,031.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.