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Finding the Fourth Proportional to 573.40, 792.10 and 511.21

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Solution

The fourth proportional to 573.40, 792.10 and 511.21 is: 706.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.40 : 792.10 = 511.21 : x
  2. Step 2: Convert to fraction form
    573.40/792.10 = 511.21/x
  3. Step 3: Cross multiply
    573.40x = 792.10 × 511.21
  4. Step 4: Simplify right side
    573.40x = 404,932.51
  5. Step 5: Solve for x
    x = 404,932.51/573.40
  6. Step 6: Final answer
    x = 706.19

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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.