Home / 1,641.78-2,265.69-943.20

Finding the Fourth Proportional to 1,641.78, 2,265.69 and 943.20

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Solution

The fourth proportional to 1,641.78, 2,265.69 and 943.20 is: 1,301.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.78 : 2,265.69 = 943.20 : x
  2. Step 2: Convert to fraction form
    1,641.78/2,265.69 = 943.20/x
  3. Step 3: Cross multiply
    1,641.78x = 2,265.69 × 943.20
  4. Step 4: Simplify right side
    1,641.78x = 2,136,998.81
  5. Step 5: Solve for x
    x = 2,136,998.81/1,641.78
  6. Step 6: Final answer
    x = 1,301.64

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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.