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Finding the Fourth Proportional to 1,507.87, 2,260.86 and 857.71

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Solution

The fourth proportional to 1,507.87, 2,260.86 and 857.71 is: 1,286.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.87 : 2,260.86 = 857.71 : x
  2. Step 2: Convert to fraction form
    1,507.87/2,260.86 = 857.71/x
  3. Step 3: Cross multiply
    1,507.87x = 2,260.86 × 857.71
  4. Step 4: Simplify right side
    1,507.87x = 1,939,162.23
  5. Step 5: Solve for x
    x = 1,939,162.23/1,507.87
  6. Step 6: Final answer
    x = 1,286.03

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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.