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Finding the Fourth Proportional to 689,149.50, 951,084.63 and 387,401.82

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Solution

The fourth proportional to 689,149.50, 951,084.63 and 387,401.82 is: 534,647.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,149.50 : 951,084.63 = 387,401.82 : x
  2. Step 2: Convert to fraction form
    689,149.50/951,084.63 = 387,401.82/x
  3. Step 3: Cross multiply
    689,149.50x = 951,084.63 × 387,401.82
  4. Step 4: Simplify right side
    689,149.50x = 368,451,916,636.03
  5. Step 5: Solve for x
    x = 368,451,916,636.03/689,149.50
  6. Step 6: Final answer
    x = 534,647.30

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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.