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Finding the Fourth Proportional to 419.18, 627.39 and 256.07

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Solution

The fourth proportional to 419.18, 627.39 and 256.07 is: 383.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.18 : 627.39 = 256.07 : x
  2. Step 2: Convert to fraction form
    419.18/627.39 = 256.07/x
  3. Step 3: Cross multiply
    419.18x = 627.39 × 256.07
  4. Step 4: Simplify right side
    419.18x = 160,655.76
  5. Step 5: Solve for x
    x = 160,655.76/419.18
  6. Step 6: Final answer
    x = 383.26

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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.