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Finding the Fourth Proportional to 1,720.81, 2,575.06 and 1,490.49

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Solution

The fourth proportional to 1,720.81, 2,575.06 and 1,490.49 is: 2,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.81 : 2,575.06 = 1,490.49 : x
  2. Step 2: Convert to fraction form
    1,720.81/2,575.06 = 1,490.49/x
  3. Step 3: Cross multiply
    1,720.81x = 2,575.06 × 1,490.49
  4. Step 4: Simplify right side
    1,720.81x = 3,838,097.45
  5. Step 5: Solve for x
    x = 3,838,097.45/1,720.81
  6. Step 6: Final answer
    x = 2,230.40

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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.