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Finding the Fourth Proportional to 838.30, 1,157.02 and 506.84

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Solution

The fourth proportional to 838.30, 1,157.02 and 506.84 is: 699.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.30 : 1,157.02 = 506.84 : x
  2. Step 2: Convert to fraction form
    838.30/1,157.02 = 506.84/x
  3. Step 3: Cross multiply
    838.30x = 1,157.02 × 506.84
  4. Step 4: Simplify right side
    838.30x = 586,424.02
  5. Step 5: Solve for x
    x = 586,424.02/838.30
  6. Step 6: Final answer
    x = 699.54

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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.