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Finding the Fourth Proportional to 705.50, 973.60 and 395

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Solution

The fourth proportional to 705.50, 973.60 and 395 is: 545.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.50 : 973.60 = 395 : x
  2. Step 2: Convert to fraction form
    705.50/973.60 = 395/x
  3. Step 3: Cross multiply
    705.50x = 973.60 × 395
  4. Step 4: Simplify right side
    705.50x = 384,572
  5. Step 5: Solve for x
    x = 384,572/705.50
  6. Step 6: Final answer
    x = 545.11

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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.