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Finding the Fourth Proportional to 211,188.55, 315,995.49 and 208,826.59

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Solution

The fourth proportional to 211,188.55, 315,995.49 and 208,826.59 is: 312,461.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,188.55 : 315,995.49 = 208,826.59 : x
  2. Step 2: Convert to fraction form
    211,188.55/315,995.49 = 208,826.59/x
  3. Step 3: Cross multiply
    211,188.55x = 315,995.49 × 208,826.59
  4. Step 4: Simplify right side
    211,188.55x = 65,988,260,632.08
  5. Step 5: Solve for x
    x = 65,988,260,632.08/211,188.55
  6. Step 6: Final answer
    x = 312,461.36

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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.