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Finding the Fourth Proportional to 3,011.81, 4,518.14 and 931.99

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Solution

The fourth proportional to 3,011.81, 4,518.14 and 931.99 is: 1,398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,011.81 : 4,518.14 = 931.99 : x
  2. Step 2: Convert to fraction form
    3,011.81/4,518.14 = 931.99/x
  3. Step 3: Cross multiply
    3,011.81x = 4,518.14 × 931.99
  4. Step 4: Simplify right side
    3,011.81x = 4,210,861.30
  5. Step 5: Solve for x
    x = 4,210,861.30/3,011.81
  6. Step 6: Final answer
    x = 1,398.12

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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.