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Finding the Fourth Proportional to 417.39, 628.40 and 368.91

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Solution

The fourth proportional to 417.39, 628.40 and 368.91 is: 555.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.39 : 628.40 = 368.91 : x
  2. Step 2: Convert to fraction form
    417.39/628.40 = 368.91/x
  3. Step 3: Cross multiply
    417.39x = 628.40 × 368.91
  4. Step 4: Simplify right side
    417.39x = 231,821.20
  5. Step 5: Solve for x
    x = 231,821.20/417.39
  6. Step 6: Final answer
    x = 555.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.