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Finding the Fourth Proportional to 707.99, 976.83 and 442.70

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Solution

The fourth proportional to 707.99, 976.83 and 442.70 is: 610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.99 : 976.83 = 442.70 : x
  2. Step 2: Convert to fraction form
    707.99/976.83 = 442.70/x
  3. Step 3: Cross multiply
    707.99x = 976.83 × 442.70
  4. Step 4: Simplify right side
    707.99x = 432,442.64
  5. Step 5: Solve for x
    x = 432,442.64/707.99
  6. Step 6: Final answer
    x = 610.80

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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.