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Finding the Fourth Proportional to 2,157.93, 2,981.17 and 1,720.53

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Solution

The fourth proportional to 2,157.93, 2,981.17 and 1,720.53 is: 2,376.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.93 : 2,981.17 = 1,720.53 : x
  2. Step 2: Convert to fraction form
    2,157.93/2,981.17 = 1,720.53/x
  3. Step 3: Cross multiply
    2,157.93x = 2,981.17 × 1,720.53
  4. Step 4: Simplify right side
    2,157.93x = 5,129,192.42
  5. Step 5: Solve for x
    x = 5,129,192.42/2,157.93
  6. Step 6: Final answer
    x = 2,376.90

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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.