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Finding the Third Proportional to 390,552 and 585,828

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Solution

The third proportional to 390,552 and 585,828 is: 878,742

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,552 : 585,828 = 585,828 : x
  2. Step 2: Convert to fraction form
    390,552/585,828 = 585,828/x
  3. Step 3: Cross multiply
    390,552x = 585,828 × 585,828
  4. Step 4: Simplify right side
    390,552x = 343,194,445,584
  5. Step 5: Solve for x
    x = 343,194,445,584/390,552
  6. Step 6: Final answer
    x = 878,742

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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.