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Finding the Fourth Proportional to 905.02, 1,248.97 and 506.65

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Solution

The fourth proportional to 905.02, 1,248.97 and 506.65 is: 699.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.02 : 1,248.97 = 506.65 : x
  2. Step 2: Convert to fraction form
    905.02/1,248.97 = 506.65/x
  3. Step 3: Cross multiply
    905.02x = 1,248.97 × 506.65
  4. Step 4: Simplify right side
    905.02x = 632,792.51
  5. Step 5: Solve for x
    x = 632,792.51/905.02
  6. Step 6: Final answer
    x = 699.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.