Home / 1,262.47-1,890.77-1,218.68

Finding the Fourth Proportional to 1,262.47, 1,890.77 and 1,218.68

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Solution

The fourth proportional to 1,262.47, 1,890.77 and 1,218.68 is: 1,825.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.47 : 1,890.77 = 1,218.68 : x
  2. Step 2: Convert to fraction form
    1,262.47/1,890.77 = 1,218.68/x
  3. Step 3: Cross multiply
    1,262.47x = 1,890.77 × 1,218.68
  4. Step 4: Simplify right side
    1,262.47x = 2,304,235.13
  5. Step 5: Solve for x
    x = 2,304,235.13/1,262.47
  6. Step 6: Final answer
    x = 1,825.18

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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.