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Finding the Fourth Proportional to 554.75, 765.90 and 358.63

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Solution

The fourth proportional to 554.75, 765.90 and 358.63 is: 495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.75 : 765.90 = 358.63 : x
  2. Step 2: Convert to fraction form
    554.75/765.90 = 358.63/x
  3. Step 3: Cross multiply
    554.75x = 765.90 × 358.63
  4. Step 4: Simplify right side
    554.75x = 274,674.72
  5. Step 5: Solve for x
    x = 274,674.72/554.75
  6. Step 6: Final answer
    x = 495.13

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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.