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Finding the Fourth Proportional to 700.05, 1,050.08 and 213.11

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Solution

The fourth proportional to 700.05, 1,050.08 and 213.11 is: 319.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.05 : 1,050.08 = 213.11 : x
  2. Step 2: Convert to fraction form
    700.05/1,050.08 = 213.11/x
  3. Step 3: Cross multiply
    700.05x = 1,050.08 × 213.11
  4. Step 4: Simplify right side
    700.05x = 223,776.23
  5. Step 5: Solve for x
    x = 223,776.23/700.05
  6. Step 6: Final answer
    x = 319.66

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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.