Home / 2,572.17-3,858.39-840.75

Finding the Fourth Proportional to 2,572.17, 3,858.39 and 840.75

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Solution

The fourth proportional to 2,572.17, 3,858.39 and 840.75 is: 1,261.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.17 : 3,858.39 = 840.75 : x
  2. Step 2: Convert to fraction form
    2,572.17/3,858.39 = 840.75/x
  3. Step 3: Cross multiply
    2,572.17x = 3,858.39 × 840.75
  4. Step 4: Simplify right side
    2,572.17x = 3,243,941.39
  5. Step 5: Solve for x
    x = 3,243,941.39/2,572.17
  6. Step 6: Final answer
    x = 1,261.17

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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.