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Finding the Fourth Proportional to 1,720.21, 2,373.99 and 974.24

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Solution

The fourth proportional to 1,720.21, 2,373.99 and 974.24 is: 1,344.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.21 : 2,373.99 = 974.24 : x
  2. Step 2: Convert to fraction form
    1,720.21/2,373.99 = 974.24/x
  3. Step 3: Cross multiply
    1,720.21x = 2,373.99 × 974.24
  4. Step 4: Simplify right side
    1,720.21x = 2,312,836.02
  5. Step 5: Solve for x
    x = 2,312,836.02/1,720.21
  6. Step 6: Final answer
    x = 1,344.51

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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.