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Finding the Fourth Proportional to 914.88, 1,262.45 and 620.26

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Solution

The fourth proportional to 914.88, 1,262.45 and 620.26 is: 855.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.88 : 1,262.45 = 620.26 : x
  2. Step 2: Convert to fraction form
    914.88/1,262.45 = 620.26/x
  3. Step 3: Cross multiply
    914.88x = 1,262.45 × 620.26
  4. Step 4: Simplify right side
    914.88x = 783,048.07
  5. Step 5: Solve for x
    x = 783,048.07/914.88
  6. Step 6: Final answer
    x = 855.90

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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.