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Finding the Fourth Proportional to 1,755.42, 2,631.50 and 660.51

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Solution

The fourth proportional to 1,755.42, 2,631.50 and 660.51 is: 990.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.42 : 2,631.50 = 660.51 : x
  2. Step 2: Convert to fraction form
    1,755.42/2,631.50 = 660.51/x
  3. Step 3: Cross multiply
    1,755.42x = 2,631.50 × 660.51
  4. Step 4: Simplify right side
    1,755.42x = 1,738,133.72
  5. Step 5: Solve for x
    x = 1,738,133.72/1,755.42
  6. Step 6: Final answer
    x = 990.15

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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.