Home / 1,689.63-2,331.67-943.60

Finding the Fourth Proportional to 1,689.63, 2,331.67 and 943.60

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Solution

The fourth proportional to 1,689.63, 2,331.67 and 943.60 is: 1,302.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.63 : 2,331.67 = 943.60 : x
  2. Step 2: Convert to fraction form
    1,689.63/2,331.67 = 943.60/x
  3. Step 3: Cross multiply
    1,689.63x = 2,331.67 × 943.60
  4. Step 4: Simplify right side
    1,689.63x = 2,200,168.32
  5. Step 5: Solve for x
    x = 2,200,168.32/1,689.63
  6. Step 6: Final answer
    x = 1,302.16

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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.