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Finding the Fourth Proportional to 368.28, 508.14 and 257.58

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Solution

The fourth proportional to 368.28, 508.14 and 257.58 is: 355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.28 : 508.14 = 257.58 : x
  2. Step 2: Convert to fraction form
    368.28/508.14 = 257.58/x
  3. Step 3: Cross multiply
    368.28x = 508.14 × 257.58
  4. Step 4: Simplify right side
    368.28x = 130,886.70
  5. Step 5: Solve for x
    x = 130,886.70/368.28
  6. Step 6: Final answer
    x = 355.40

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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.