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Finding the Fourth Proportional to 700.99, 1,050.39 and 408.58

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Solution

The fourth proportional to 700.99, 1,050.39 and 408.58 is: 612.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.99 : 1,050.39 = 408.58 : x
  2. Step 2: Convert to fraction form
    700.99/1,050.39 = 408.58/x
  3. Step 3: Cross multiply
    700.99x = 1,050.39 × 408.58
  4. Step 4: Simplify right side
    700.99x = 429,165.72
  5. Step 5: Solve for x
    x = 429,165.72/700.99
  6. Step 6: Final answer
    x = 612.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.