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Finding the Fourth Proportional to 1,755.54, 2,632.59 and 780.98

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Solution

The fourth proportional to 1,755.54, 2,632.59 and 780.98 is: 1,171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.54 : 2,632.59 = 780.98 : x
  2. Step 2: Convert to fraction form
    1,755.54/2,632.59 = 780.98/x
  3. Step 3: Cross multiply
    1,755.54x = 2,632.59 × 780.98
  4. Step 4: Simplify right side
    1,755.54x = 2,055,986.98
  5. Step 5: Solve for x
    x = 2,055,986.98/1,755.54
  6. Step 6: Final answer
    x = 1,171.14

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1.5x scale

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.