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Finding the Fourth Proportional to 1,640.89, 2,264.40 and 942.25

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Solution

The fourth proportional to 1,640.89, 2,264.40 and 942.25 is: 1,300.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.89 : 2,264.40 = 942.25 : x
  2. Step 2: Convert to fraction form
    1,640.89/2,264.40 = 942.25/x
  3. Step 3: Cross multiply
    1,640.89x = 2,264.40 × 942.25
  4. Step 4: Simplify right side
    1,640.89x = 2,133,630.90
  5. Step 5: Solve for x
    x = 2,133,630.90/1,640.89
  6. Step 6: Final answer
    x = 1,300.29

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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.