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Finding the Third Proportional to 387,354 and 528,087

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Solution

The third proportional to 387,354 and 528,087 is: 719,950.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,354 : 528,087 = 528,087 : x
  2. Step 2: Convert to fraction form
    387,354/528,087 = 528,087/x
  3. Step 3: Cross multiply
    387,354x = 528,087 × 528,087
  4. Step 4: Simplify right side
    387,354x = 278,875,879,569
  5. Step 5: Solve for x
    x = 278,875,879,569/387,354
  6. Step 6: Final answer
    x = 719,950.95

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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.