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Finding the Fourth Proportional to 621,661.62, 857,812.37 and 349,720.34

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Solution

The fourth proportional to 621,661.62, 857,812.37 and 349,720.34 is: 482,568.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,661.62 : 857,812.37 = 349,720.34 : x
  2. Step 2: Convert to fraction form
    621,661.62/857,812.37 = 349,720.34/x
  3. Step 3: Cross multiply
    621,661.62x = 857,812.37 × 349,720.34
  4. Step 4: Simplify right side
    621,661.62x = 299,994,433,692.61
  5. Step 5: Solve for x
    x = 299,994,433,692.61/621,661.62
  6. Step 6: Final answer
    x = 482,568.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.