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Finding the Fourth Proportional to 1,720.54, 2,373.51 and 1,021.42

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Solution

The fourth proportional to 1,720.54, 2,373.51 and 1,021.42 is: 1,409.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.54 : 2,373.51 = 1,021.42 : x
  2. Step 2: Convert to fraction form
    1,720.54/2,373.51 = 1,021.42/x
  3. Step 3: Cross multiply
    1,720.54x = 2,373.51 × 1,021.42
  4. Step 4: Simplify right side
    1,720.54x = 2,424,350.58
  5. Step 5: Solve for x
    x = 2,424,350.58/1,720.54
  6. Step 6: Final answer
    x = 1,409.06

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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.