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Finding the Fourth Proportional to 211,990.67, 317,985.26 and 201,347.90

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Solution

The fourth proportional to 211,990.67, 317,985.26 and 201,347.90 is: 302,021.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,990.67 : 317,985.26 = 201,347.90 : x
  2. Step 2: Convert to fraction form
    211,990.67/317,985.26 = 201,347.90/x
  3. Step 3: Cross multiply
    211,990.67x = 317,985.26 × 201,347.90
  4. Step 4: Simplify right side
    211,990.67x = 64,025,661,735.29
  5. Step 5: Solve for x
    x = 64,025,661,735.29/211,990.67
  6. Step 6: Final answer
    x = 302,021.14

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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.