Home / 2,074.02-3,111.33-686.90

Finding the Fourth Proportional to 2,074.02, 3,111.33 and 686.90

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Solution

The fourth proportional to 2,074.02, 3,111.33 and 686.90 is: 1,030.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.02 : 3,111.33 = 686.90 : x
  2. Step 2: Convert to fraction form
    2,074.02/3,111.33 = 686.90/x
  3. Step 3: Cross multiply
    2,074.02x = 3,111.33 × 686.90
  4. Step 4: Simplify right side
    2,074.02x = 2,137,172.58
  5. Step 5: Solve for x
    x = 2,137,172.58/2,074.02
  6. Step 6: Final answer
    x = 1,030.45

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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.