Home / 1,386.11-2,078.48-461.35

Finding the Fourth Proportional to 1,386.11, 2,078.48 and 461.35

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Solution

The fourth proportional to 1,386.11, 2,078.48 and 461.35 is: 691.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.11 : 2,078.48 = 461.35 : x
  2. Step 2: Convert to fraction form
    1,386.11/2,078.48 = 461.35/x
  3. Step 3: Cross multiply
    1,386.11x = 2,078.48 × 461.35
  4. Step 4: Simplify right side
    1,386.11x = 958,894.05
  5. Step 5: Solve for x
    x = 958,894.05/1,386.11
  6. Step 6: Final answer
    x = 691.79

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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.