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Finding the Fourth Proportional to 529.54, 790.56 and 405.48

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Solution

The fourth proportional to 529.54, 790.56 and 405.48 is: 605.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.54 : 790.56 = 405.48 : x
  2. Step 2: Convert to fraction form
    529.54/790.56 = 405.48/x
  3. Step 3: Cross multiply
    529.54x = 790.56 × 405.48
  4. Step 4: Simplify right side
    529.54x = 320,556.27
  5. Step 5: Solve for x
    x = 320,556.27/529.54
  6. Step 6: Final answer
    x = 605.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.