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Finding the Fourth Proportional to 605.60, 908.40 and 313.10

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Solution

The fourth proportional to 605.60, 908.40 and 313.10 is: 469.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.60 : 908.40 = 313.10 : x
  2. Step 2: Convert to fraction form
    605.60/908.40 = 313.10/x
  3. Step 3: Cross multiply
    605.60x = 908.40 × 313.10
  4. Step 4: Simplify right side
    605.60x = 284,420.04
  5. Step 5: Solve for x
    x = 284,420.04/605.60
  6. Step 6: Final answer
    x = 469.65

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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.