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Finding the Fourth Proportional to 1,260.35, 1,739.42 and 700.87

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Solution

The fourth proportional to 1,260.35, 1,739.42 and 700.87 is: 967.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.35 : 1,739.42 = 700.87 : x
  2. Step 2: Convert to fraction form
    1,260.35/1,739.42 = 700.87/x
  3. Step 3: Cross multiply
    1,260.35x = 1,739.42 × 700.87
  4. Step 4: Simplify right side
    1,260.35x = 1,219,107.30
  5. Step 5: Solve for x
    x = 1,219,107.30/1,260.35
  6. Step 6: Final answer
    x = 967.28

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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.