Home / 1,259.65-1,739.42-1,218.34

Finding the Fourth Proportional to 1,259.65, 1,739.42 and 1,218.34

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Solution

The fourth proportional to 1,259.65, 1,739.42 and 1,218.34 is: 1,682.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.65 : 1,739.42 = 1,218.34 : x
  2. Step 2: Convert to fraction form
    1,259.65/1,739.42 = 1,218.34/x
  3. Step 3: Cross multiply
    1,259.65x = 1,739.42 × 1,218.34
  4. Step 4: Simplify right side
    1,259.65x = 2,119,212.47
  5. Step 5: Solve for x
    x = 2,119,212.47/1,259.65
  6. Step 6: Final answer
    x = 1,682.38

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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.