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Finding the Fourth Proportional to 1,899.67, 2,849.40 and 512.99

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Solution

The fourth proportional to 1,899.67, 2,849.40 and 512.99 is: 769.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.67 : 2,849.40 = 512.99 : x
  2. Step 2: Convert to fraction form
    1,899.67/2,849.40 = 512.99/x
  3. Step 3: Cross multiply
    1,899.67x = 2,849.40 × 512.99
  4. Step 4: Simplify right side
    1,899.67x = 1,461,699.46
  5. Step 5: Solve for x
    x = 1,461,699.46/1,899.67
  6. Step 6: Final answer
    x = 769.45

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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.