Home / 2,127.10-3,191.10-646.20

Finding the Fourth Proportional to 2,127.10, 3,191.10 and 646.20

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Solution

The fourth proportional to 2,127.10, 3,191.10 and 646.20 is: 969.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.10 : 3,191.10 = 646.20 : x
  2. Step 2: Convert to fraction form
    2,127.10/3,191.10 = 646.20/x
  3. Step 3: Cross multiply
    2,127.10x = 3,191.10 × 646.20
  4. Step 4: Simplify right side
    2,127.10x = 2,062,088.82
  5. Step 5: Solve for x
    x = 2,062,088.82/2,127.10
  6. Step 6: Final answer
    x = 969.44

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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.