Home / 1,270.25-1,905.45-448.58

Finding the Fourth Proportional to 1,270.25, 1,905.45 and 448.58

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Solution

The fourth proportional to 1,270.25, 1,905.45 and 448.58 is: 672.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.25 : 1,905.45 = 448.58 : x
  2. Step 2: Convert to fraction form
    1,270.25/1,905.45 = 448.58/x
  3. Step 3: Cross multiply
    1,270.25x = 1,905.45 × 448.58
  4. Step 4: Simplify right side
    1,270.25x = 854,746.76
  5. Step 5: Solve for x
    x = 854,746.76/1,270.25
  6. Step 6: Final answer
    x = 672.90

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1.5x scale

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.