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Finding the Fourth Proportional to 689,185, 951,136.10 and 387,381.48

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Solution

The fourth proportional to 689,185, 951,136.10 and 387,381.48 is: 534,620.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,185 : 951,136.10 = 387,381.48 : x
  2. Step 2: Convert to fraction form
    689,185/951,136.10 = 387,381.48/x
  3. Step 3: Cross multiply
    689,185x = 951,136.10 × 387,381.48
  4. Step 4: Simplify right side
    689,185x = 368,452,510,099.43
  5. Step 5: Solve for x
    x = 368,452,510,099.43/689,185
  6. Step 6: Final answer
    x = 534,620.62

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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.