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Finding the Fourth Proportional to 605.97, 907.74 and 389.70

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Solution

The fourth proportional to 605.97, 907.74 and 389.70 is: 583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.97 : 907.74 = 389.70 : x
  2. Step 2: Convert to fraction form
    605.97/907.74 = 389.70/x
  3. Step 3: Cross multiply
    605.97x = 907.74 × 389.70
  4. Step 4: Simplify right side
    605.97x = 353,746.28
  5. Step 5: Solve for x
    x = 353,746.28/605.97
  6. Step 6: Final answer
    x = 583.77

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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.