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Finding the Fourth Proportional to 608.90, 910.90 and 506.40

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Solution

The fourth proportional to 608.90, 910.90 and 506.40 is: 757.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.90 : 910.90 = 506.40 : x
  2. Step 2: Convert to fraction form
    608.90/910.90 = 506.40/x
  3. Step 3: Cross multiply
    608.90x = 910.90 × 506.40
  4. Step 4: Simplify right side
    608.90x = 461,279.76
  5. Step 5: Solve for x
    x = 461,279.76/608.90
  6. Step 6: Final answer
    x = 757.56

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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.