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Finding the Fourth Proportional to 1,012.03, 1,395.90 and 619.26

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Solution

The fourth proportional to 1,012.03, 1,395.90 and 619.26 is: 854.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.03 : 1,395.90 = 619.26 : x
  2. Step 2: Convert to fraction form
    1,012.03/1,395.90 = 619.26/x
  3. Step 3: Cross multiply
    1,012.03x = 1,395.90 × 619.26
  4. Step 4: Simplify right side
    1,012.03x = 864,425.03
  5. Step 5: Solve for x
    x = 864,425.03/1,012.03
  6. Step 6: Final answer
    x = 854.15

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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.