Home / 1,260.76-1,739.79-701.21

Finding the Fourth Proportional to 1,260.76, 1,739.79 and 701.21

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Solution

The fourth proportional to 1,260.76, 1,739.79 and 701.21 is: 967.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.76 : 1,739.79 = 701.21 : x
  2. Step 2: Convert to fraction form
    1,260.76/1,739.79 = 701.21/x
  3. Step 3: Cross multiply
    1,260.76x = 1,739.79 × 701.21
  4. Step 4: Simplify right side
    1,260.76x = 1,219,958.15
  5. Step 5: Solve for x
    x = 1,219,958.15/1,260.76
  6. Step 6: Final answer
    x = 967.64

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.