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Finding the Fourth Proportional to 914.13, 1,371.60 and 621.99

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Solution

The fourth proportional to 914.13, 1,371.60 and 621.99 is: 933.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.13 : 1,371.60 = 621.99 : x
  2. Step 2: Convert to fraction form
    914.13/1,371.60 = 621.99/x
  3. Step 3: Cross multiply
    914.13x = 1,371.60 × 621.99
  4. Step 4: Simplify right side
    914.13x = 853,121.48
  5. Step 5: Solve for x
    x = 853,121.48/914.13
  6. Step 6: Final answer
    x = 933.26

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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.