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Finding the Fourth Proportional to 1,538.54, 2,307.21 and 551.34

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Solution

The fourth proportional to 1,538.54, 2,307.21 and 551.34 is: 826.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.54 : 2,307.21 = 551.34 : x
  2. Step 2: Convert to fraction form
    1,538.54/2,307.21 = 551.34/x
  3. Step 3: Cross multiply
    1,538.54x = 2,307.21 × 551.34
  4. Step 4: Simplify right side
    1,538.54x = 1,272,057.16
  5. Step 5: Solve for x
    x = 1,272,057.16/1,538.54
  6. Step 6: Final answer
    x = 826.79

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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.