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Finding the Fourth Proportional to 368.78, 508.03 and 258.05

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Solution

The fourth proportional to 368.78, 508.03 and 258.05 is: 355.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.78 : 508.03 = 258.05 : x
  2. Step 2: Convert to fraction form
    368.78/508.03 = 258.05/x
  3. Step 3: Cross multiply
    368.78x = 508.03 × 258.05
  4. Step 4: Simplify right side
    368.78x = 131,097.77
  5. Step 5: Solve for x
    x = 131,097.77/368.78
  6. Step 6: Final answer
    x = 355.50

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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.