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Finding the Fourth Proportional to 605.72, 907.56 and 389.18

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Solution

The fourth proportional to 605.72, 907.56 and 389.18 is: 583.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.72 : 907.56 = 389.18 : x
  2. Step 2: Convert to fraction form
    605.72/907.56 = 389.18/x
  3. Step 3: Cross multiply
    605.72x = 907.56 × 389.18
  4. Step 4: Simplify right side
    605.72x = 353,204.20
  5. Step 5: Solve for x
    x = 353,204.20/605.72
  6. Step 6: Final answer
    x = 583.11

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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.