Home / 2,114.71-2,921.40-1,643.76

Finding the Fourth Proportional to 2,114.71, 2,921.40 and 1,643.76

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Solution

The fourth proportional to 2,114.71, 2,921.40 and 1,643.76 is: 2,270.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.71 : 2,921.40 = 1,643.76 : x
  2. Step 2: Convert to fraction form
    2,114.71/2,921.40 = 1,643.76/x
  3. Step 3: Cross multiply
    2,114.71x = 2,921.40 × 1,643.76
  4. Step 4: Simplify right side
    2,114.71x = 4,802,080.46
  5. Step 5: Solve for x
    x = 4,802,080.46/2,114.71
  6. Step 6: Final answer
    x = 2,270.80

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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.