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Finding the Fourth Proportional to 1,899.80, 2,849.68 and 513.01

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Solution

The fourth proportional to 1,899.80, 2,849.68 and 513.01 is: 769.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.80 : 2,849.68 = 513.01 : x
  2. Step 2: Convert to fraction form
    1,899.80/2,849.68 = 513.01/x
  3. Step 3: Cross multiply
    1,899.80x = 2,849.68 × 513.01
  4. Step 4: Simplify right side
    1,899.80x = 1,461,914.34
  5. Step 5: Solve for x
    x = 1,461,914.34/1,899.80
  6. Step 6: Final answer
    x = 769.51

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1.5x scale

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.