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Finding the Fourth Proportional to 1,503.19, 2,254.12 and 681.43

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Solution

The fourth proportional to 1,503.19, 2,254.12 and 681.43 is: 1,021.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.19 : 2,254.12 = 681.43 : x
  2. Step 2: Convert to fraction form
    1,503.19/2,254.12 = 681.43/x
  3. Step 3: Cross multiply
    1,503.19x = 2,254.12 × 681.43
  4. Step 4: Simplify right side
    1,503.19x = 1,536,024.99
  5. Step 5: Solve for x
    x = 1,536,024.99/1,503.19
  6. Step 6: Final answer
    x = 1,021.84

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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.