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Finding the Third Proportional to 1,490 and 4,030

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Solution

The third proportional to 1,490 and 4,030 is: 10,899.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490 : 4,030 = 4,030 : x
  2. Step 2: Convert to fraction form
    1,490/4,030 = 4,030/x
  3. Step 3: Cross multiply
    1,490x = 4,030 × 4,030
  4. Step 4: Simplify right side
    1,490x = 16,240,900
  5. Step 5: Solve for x
    x = 16,240,900/1,490
  6. Step 6: Final answer
    x = 10,899.93

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.