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Finding the Fourth Proportional to 707.83, 976.39 and 445.39

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Solution

The fourth proportional to 707.83, 976.39 and 445.39 is: 614.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.83 : 976.39 = 445.39 : x
  2. Step 2: Convert to fraction form
    707.83/976.39 = 445.39/x
  3. Step 3: Cross multiply
    707.83x = 976.39 × 445.39
  4. Step 4: Simplify right side
    707.83x = 434,874.34
  5. Step 5: Solve for x
    x = 434,874.34/707.83
  6. Step 6: Final answer
    x = 614.38

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1.5x scale

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.