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Finding the Fourth Proportional to 1,640.76, 2,264.45 and 942.13

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Solution

The fourth proportional to 1,640.76, 2,264.45 and 942.13 is: 1,300.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.76 : 2,264.45 = 942.13 : x
  2. Step 2: Convert to fraction form
    1,640.76/2,264.45 = 942.13/x
  3. Step 3: Cross multiply
    1,640.76x = 2,264.45 × 942.13
  4. Step 4: Simplify right side
    1,640.76x = 2,133,406.28
  5. Step 5: Solve for x
    x = 2,133,406.28/1,640.76
  6. Step 6: Final answer
    x = 1,300.25

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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.