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Finding the Fourth Proportional to 2,689.41, 3,712.05 and 1,903.71

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Solution

The fourth proportional to 2,689.41, 3,712.05 and 1,903.71 is: 2,627.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.41 : 3,712.05 = 1,903.71 : x
  2. Step 2: Convert to fraction form
    2,689.41/3,712.05 = 1,903.71/x
  3. Step 3: Cross multiply
    2,689.41x = 3,712.05 × 1,903.71
  4. Step 4: Simplify right side
    2,689.41x = 7,066,666.71
  5. Step 5: Solve for x
    x = 7,066,666.71/2,689.41
  6. Step 6: Final answer
    x = 2,627.59

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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.