Home / 1,281.36-1,922.82-460.20

Finding the Fourth Proportional to 1,281.36, 1,922.82 and 460.20

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Solution

The fourth proportional to 1,281.36, 1,922.82 and 460.20 is: 690.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.36 : 1,922.82 = 460.20 : x
  2. Step 2: Convert to fraction form
    1,281.36/1,922.82 = 460.20/x
  3. Step 3: Cross multiply
    1,281.36x = 1,922.82 × 460.20
  4. Step 4: Simplify right side
    1,281.36x = 884,881.76
  5. Step 5: Solve for x
    x = 884,881.76/1,281.36
  6. Step 6: Final answer
    x = 690.58

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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.