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Finding the Fourth Proportional to 1,041.26, 1,560.80 and 485.51

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Solution

The fourth proportional to 1,041.26, 1,560.80 and 485.51 is: 727.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.26 : 1,560.80 = 485.51 : x
  2. Step 2: Convert to fraction form
    1,041.26/1,560.80 = 485.51/x
  3. Step 3: Cross multiply
    1,041.26x = 1,560.80 × 485.51
  4. Step 4: Simplify right side
    1,041.26x = 757,786.20
  5. Step 5: Solve for x
    x = 757,786.20/1,041.26
  6. Step 6: Final answer
    x = 727.76

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Double scale
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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.