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Finding the Fourth Proportional to 838.10, 1,256.25 and 351.02

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Solution

The fourth proportional to 838.10, 1,256.25 and 351.02 is: 526.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.10 : 1,256.25 = 351.02 : x
  2. Step 2: Convert to fraction form
    838.10/1,256.25 = 351.02/x
  3. Step 3: Cross multiply
    838.10x = 1,256.25 × 351.02
  4. Step 4: Simplify right side
    838.10x = 440,968.88
  5. Step 5: Solve for x
    x = 440,968.88/838.10
  6. Step 6: Final answer
    x = 526.15

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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.