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Finding the Fourth Proportional to 1,740.54, 2,608.98 and 815.31

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Solution

The fourth proportional to 1,740.54, 2,608.98 and 815.31 is: 1,222.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,740.54 : 2,608.98 = 815.31 : x
  2. Step 2: Convert to fraction form
    1,740.54/2,608.98 = 815.31/x
  3. Step 3: Cross multiply
    1,740.54x = 2,608.98 × 815.31
  4. Step 4: Simplify right side
    1,740.54x = 2,127,134.01
  5. Step 5: Solve for x
    x = 2,127,134.01/1,740.54
  6. Step 6: Final answer
    x = 1,222.12

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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.