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Finding the Fourth Proportional to 388,228.92, 578,859.60 and 381,143.04

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Solution

The fourth proportional to 388,228.92, 578,859.60 and 381,143.04 is: 568,294.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,228.92 : 578,859.60 = 381,143.04 : x
  2. Step 2: Convert to fraction form
    388,228.92/578,859.60 = 381,143.04/x
  3. Step 3: Cross multiply
    388,228.92x = 578,859.60 × 381,143.04
  4. Step 4: Simplify right side
    388,228.92x = 220,628,307,677.18
  5. Step 5: Solve for x
    x = 220,628,307,677.18/388,228.92
  6. Step 6: Final answer
    x = 568,294.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.