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Finding the Fourth Proportional to 1,762.04, 2,640.74 and 938.54

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Solution

The fourth proportional to 1,762.04, 2,640.74 and 938.54 is: 1,406.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,762.04 : 2,640.74 = 938.54 : x
  2. Step 2: Convert to fraction form
    1,762.04/2,640.74 = 938.54/x
  3. Step 3: Cross multiply
    1,762.04x = 2,640.74 × 938.54
  4. Step 4: Simplify right side
    1,762.04x = 2,478,442.03
  5. Step 5: Solve for x
    x = 2,478,442.03/1,762.04
  6. Step 6: Final answer
    x = 1,406.57

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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.