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Finding the Fourth Proportional to 511.51, 705.49 and 372.08

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Solution

The fourth proportional to 511.51, 705.49 and 372.08 is: 513.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.51 : 705.49 = 372.08 : x
  2. Step 2: Convert to fraction form
    511.51/705.49 = 372.08/x
  3. Step 3: Cross multiply
    511.51x = 705.49 × 372.08
  4. Step 4: Simplify right side
    511.51x = 262,499.55
  5. Step 5: Solve for x
    x = 262,499.55/511.51
  6. Step 6: Final answer
    x = 513.19

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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.