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Finding the Fourth Proportional to 1,303.80, 1,786.35 and 1,285.57

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Solution

The fourth proportional to 1,303.80, 1,786.35 and 1,285.57 is: 1,761.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.80 : 1,786.35 = 1,285.57 : x
  2. Step 2: Convert to fraction form
    1,303.80/1,786.35 = 1,285.57/x
  3. Step 3: Cross multiply
    1,303.80x = 1,786.35 × 1,285.57
  4. Step 4: Simplify right side
    1,303.80x = 2,296,485.02
  5. Step 5: Solve for x
    x = 2,296,485.02/1,303.80
  6. Step 6: Final answer
    x = 1,761.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.