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Finding the Fourth Proportional to 1,818.57, 2,509.29 and 1,021.71

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Solution

The fourth proportional to 1,818.57, 2,509.29 and 1,021.71 is: 1,409.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.57 : 2,509.29 = 1,021.71 : x
  2. Step 2: Convert to fraction form
    1,818.57/2,509.29 = 1,021.71/x
  3. Step 3: Cross multiply
    1,818.57x = 2,509.29 × 1,021.71
  4. Step 4: Simplify right side
    1,818.57x = 2,563,766.69
  5. Step 5: Solve for x
    x = 2,563,766.69/1,818.57
  6. Step 6: Final answer
    x = 1,409.77

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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.