Home / 1,218.77-1,828.86-515.93

Finding the Fourth Proportional to 1,218.77, 1,828.86 and 515.93

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Solution

The fourth proportional to 1,218.77, 1,828.86 and 515.93 is: 774.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.77 : 1,828.86 = 515.93 : x
  2. Step 2: Convert to fraction form
    1,218.77/1,828.86 = 515.93/x
  3. Step 3: Cross multiply
    1,218.77x = 1,828.86 × 515.93
  4. Step 4: Simplify right side
    1,218.77x = 943,563.74
  5. Step 5: Solve for x
    x = 943,563.74/1,218.77
  6. Step 6: Final answer
    x = 774.19

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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.