Home / 1,642.19-2,460-1,120.89

Finding the Fourth Proportional to 1,642.19, 2,460 and 1,120.89

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Solution

The fourth proportional to 1,642.19, 2,460 and 1,120.89 is: 1,679.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.19 : 2,460 = 1,120.89 : x
  2. Step 2: Convert to fraction form
    1,642.19/2,460 = 1,120.89/x
  3. Step 3: Cross multiply
    1,642.19x = 2,460 × 1,120.89
  4. Step 4: Simplify right side
    1,642.19x = 2,757,389.40
  5. Step 5: Solve for x
    x = 2,757,389.40/1,642.19
  6. Step 6: Final answer
    x = 1,679.10

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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.