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Finding the Fourth Proportional to 2,637.95, 3,956.94 and 690.17

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Solution

The fourth proportional to 2,637.95, 3,956.94 and 690.17 is: 1,035.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,637.95 : 3,956.94 = 690.17 : x
  2. Step 2: Convert to fraction form
    2,637.95/3,956.94 = 690.17/x
  3. Step 3: Cross multiply
    2,637.95x = 3,956.94 × 690.17
  4. Step 4: Simplify right side
    2,637.95x = 2,730,961.28
  5. Step 5: Solve for x
    x = 2,730,961.28/2,637.95
  6. Step 6: Final answer
    x = 1,035.26

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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.