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Finding the Fourth Proportional to 383,075.96, 528,639.98 and 210,990.48

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Solution

The fourth proportional to 383,075.96, 528,639.98 and 210,990.48 is: 291,164.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,075.96 : 528,639.98 = 210,990.48 : x
  2. Step 2: Convert to fraction form
    383,075.96/528,639.98 = 210,990.48/x
  3. Step 3: Cross multiply
    383,075.96x = 528,639.98 × 210,990.48
  4. Step 4: Simplify right side
    383,075.96x = 111,538,002,072.44
  5. Step 5: Solve for x
    x = 111,538,002,072.44/383,075.96
  6. Step 6: Final answer
    x = 291,164.20

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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.