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Finding the Fourth Proportional to 511.10, 705.05 and 353.90

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Solution

The fourth proportional to 511.10, 705.05 and 353.90 is: 488.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.10 : 705.05 = 353.90 : x
  2. Step 2: Convert to fraction form
    511.10/705.05 = 353.90/x
  3. Step 3: Cross multiply
    511.10x = 705.05 × 353.90
  4. Step 4: Simplify right side
    511.10x = 249,511.90
  5. Step 5: Solve for x
    x = 249,511.90/511.10
  6. Step 6: Final answer
    x = 488.19

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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.