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Finding the Fourth Proportional to 511.50, 705.74 and 353.87

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Solution

The fourth proportional to 511.50, 705.74 and 353.87 is: 488.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.50 : 705.74 = 353.87 : x
  2. Step 2: Convert to fraction form
    511.50/705.74 = 353.87/x
  3. Step 3: Cross multiply
    511.50x = 705.74 × 353.87
  4. Step 4: Simplify right side
    511.50x = 249,740.80
  5. Step 5: Solve for x
    x = 249,740.80/511.50
  6. Step 6: Final answer
    x = 488.26

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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.