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Finding the Fourth Proportional to 1,261.02, 1,740.49 and 730.00

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Solution

The fourth proportional to 1,261.02, 1,740.49 and 730.00 is: 1,007.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.02 : 1,740.49 = 730.00 : x
  2. Step 2: Convert to fraction form
    1,261.02/1,740.49 = 730.00/x
  3. Step 3: Cross multiply
    1,261.02x = 1,740.49 × 730.00
  4. Step 4: Simplify right side
    1,261.02x = 1,270,558.05
  5. Step 5: Solve for x
    x = 1,270,558.05/1,261.02
  6. Step 6: Final answer
    x = 1,007.56

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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.