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Finding the Fourth Proportional to 210.07, 315.15 and 149.05

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Solution

The fourth proportional to 210.07, 315.15 and 149.05 is: 223.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.07 : 315.15 = 149.05 : x
  2. Step 2: Convert to fraction form
    210.07/315.15 = 149.05/x
  3. Step 3: Cross multiply
    210.07x = 315.15 × 149.05
  4. Step 4: Simplify right side
    210.07x = 46,973.11
  5. Step 5: Solve for x
    x = 46,973.11/210.07
  6. Step 6: Final answer
    x = 223.61

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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.