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Finding the Fourth Proportional to 605.48, 907.68 and 345.20

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Solution

The fourth proportional to 605.48, 907.68 and 345.20 is: 517.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.48 : 907.68 = 345.20 : x
  2. Step 2: Convert to fraction form
    605.48/907.68 = 345.20/x
  3. Step 3: Cross multiply
    605.48x = 907.68 × 345.20
  4. Step 4: Simplify right side
    605.48x = 313,331.14
  5. Step 5: Solve for x
    x = 313,331.14/605.48
  6. Step 6: Final answer
    x = 517.49

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Double scale
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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.