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Finding the Fourth Proportional to 699.93, 1,050.12 and 213.08

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Solution

The fourth proportional to 699.93, 1,050.12 and 213.08 is: 319.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.93 : 1,050.12 = 213.08 : x
  2. Step 2: Convert to fraction form
    699.93/1,050.12 = 213.08/x
  3. Step 3: Cross multiply
    699.93x = 1,050.12 × 213.08
  4. Step 4: Simplify right side
    699.93x = 223,754.32
  5. Step 5: Solve for x
    x = 223,754.32/699.93
  6. Step 6: Final answer
    x = 319.68

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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.