Home / 1,281.20-1,766.06-1,072.08

Finding the Fourth Proportional to 1,281.20, 1,766.06 and 1,072.08

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Solution

The fourth proportional to 1,281.20, 1,766.06 and 1,072.08 is: 1,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.20 : 1,766.06 = 1,072.08 : x
  2. Step 2: Convert to fraction form
    1,281.20/1,766.06 = 1,072.08/x
  3. Step 3: Cross multiply
    1,281.20x = 1,766.06 × 1,072.08
  4. Step 4: Simplify right side
    1,281.20x = 1,893,357.60
  5. Step 5: Solve for x
    x = 1,893,357.60/1,281.20
  6. Step 6: Final answer
    x = 1,477.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.