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Finding the Fourth Proportional to 1,478.99, 2,040.99 and 849.59

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Solution

The fourth proportional to 1,478.99, 2,040.99 and 849.59 is: 1,172.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.99 : 2,040.99 = 849.59 : x
  2. Step 2: Convert to fraction form
    1,478.99/2,040.99 = 849.59/x
  3. Step 3: Cross multiply
    1,478.99x = 2,040.99 × 849.59
  4. Step 4: Simplify right side
    1,478.99x = 1,733,994.49
  5. Step 5: Solve for x
    x = 1,733,994.49/1,478.99
  6. Step 6: Final answer
    x = 1,172.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.