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Finding the Fourth Proportional to 628.74, 941.55 and 368.05

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Solution

The fourth proportional to 628.74, 941.55 and 368.05 is: 551.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.74 : 941.55 = 368.05 : x
  2. Step 2: Convert to fraction form
    628.74/941.55 = 368.05/x
  3. Step 3: Cross multiply
    628.74x = 941.55 × 368.05
  4. Step 4: Simplify right side
    628.74x = 346,537.48
  5. Step 5: Solve for x
    x = 346,537.48/628.74
  6. Step 6: Final answer
    x = 551.17

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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.