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Finding the Third Proportional to 4,230 and 4,590

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Solution

The third proportional to 4,230 and 4,590 is: 4,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,230 : 4,590 = 4,590 : x
  2. Step 2: Convert to fraction form
    4,230/4,590 = 4,590/x
  3. Step 3: Cross multiply
    4,230x = 4,590 × 4,590
  4. Step 4: Simplify right side
    4,230x = 21,068,100
  5. Step 5: Solve for x
    x = 21,068,100/4,230
  6. Step 6: Final answer
    x = 4,980.64

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.