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Finding the Fourth Proportional to 604.87, 907.40 and 396.70

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Solution

The fourth proportional to 604.87, 907.40 and 396.70 is: 595.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.87 : 907.40 = 396.70 : x
  2. Step 2: Convert to fraction form
    604.87/907.40 = 396.70/x
  3. Step 3: Cross multiply
    604.87x = 907.40 × 396.70
  4. Step 4: Simplify right side
    604.87x = 359,964.30
  5. Step 5: Solve for x
    x = 359,964.30/604.87
  6. Step 6: Final answer
    x = 595.11

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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.