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Finding the Fourth Proportional to 974.63, 1,344.99 and 555.07

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Solution

The fourth proportional to 974.63, 1,344.99 and 555.07 is: 765.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.63 : 1,344.99 = 555.07 : x
  2. Step 2: Convert to fraction form
    974.63/1,344.99 = 555.07/x
  3. Step 3: Cross multiply
    974.63x = 1,344.99 × 555.07
  4. Step 4: Simplify right side
    974.63x = 746,556.87
  5. Step 5: Solve for x
    x = 746,556.87/974.63
  6. Step 6: Final answer
    x = 765.99

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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.