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Finding the Fourth Proportional to 608,136, 839,253.60 and 339,864

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Solution

The fourth proportional to 608,136, 839,253.60 and 339,864 is: 469,026.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,136 : 839,253.60 = 339,864 : x
  2. Step 2: Convert to fraction form
    608,136/839,253.60 = 339,864/x
  3. Step 3: Cross multiply
    608,136x = 839,253.60 × 339,864
  4. Step 4: Simplify right side
    608,136x = 285,232,085,510.40
  5. Step 5: Solve for x
    x = 285,232,085,510.40/608,136
  6. Step 6: Final answer
    x = 469,026.81

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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.