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Finding the Fourth Proportional to 1,303.14, 1,954.75 and 378.80

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Solution

The fourth proportional to 1,303.14, 1,954.75 and 378.80 is: 568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,303.14 : 1,954.75 = 378.80 : x
  2. Step 2: Convert to fraction form
    1,303.14/1,954.75 = 378.80/x
  3. Step 3: Cross multiply
    1,303.14x = 1,954.75 × 378.80
  4. Step 4: Simplify right side
    1,303.14x = 740,448.15
  5. Step 5: Solve for x
    x = 740,448.15/1,303.14
  6. Step 6: Final answer
    x = 568.20

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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.