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Finding the Fourth Proportional to 382,790.21, 528,300.83 and 219,510.61

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Solution

The fourth proportional to 382,790.21, 528,300.83 and 219,510.61 is: 302,953.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,790.21 : 528,300.83 = 219,510.61 : x
  2. Step 2: Convert to fraction form
    382,790.21/528,300.83 = 219,510.61/x
  3. Step 3: Cross multiply
    382,790.21x = 528,300.83 × 219,510.61
  4. Step 4: Simplify right side
    382,790.21x = 115,967,636,684.83
  5. Step 5: Solve for x
    x = 115,967,636,684.83/382,790.21
  6. Step 6: Final answer
    x = 302,953.51

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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.