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Finding the Third Proportional to 387,319 and 528,037

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Solution

The third proportional to 387,319 and 528,037 is: 719,879.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,319 : 528,037 = 528,037 : x
  2. Step 2: Convert to fraction form
    387,319/528,037 = 528,037/x
  3. Step 3: Cross multiply
    387,319x = 528,037 × 528,037
  4. Step 4: Simplify right side
    387,319x = 278,823,073,369
  5. Step 5: Solve for x
    x = 278,823,073,369/387,319
  6. Step 6: Final answer
    x = 719,879.67

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.