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Finding the Fourth Proportional to 353,075.09, 487,314.36 and 209,807.42

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Solution

The fourth proportional to 353,075.09, 487,314.36 and 209,807.42 is: 289,576.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,075.09 : 487,314.36 = 209,807.42 : x
  2. Step 2: Convert to fraction form
    353,075.09/487,314.36 = 209,807.42/x
  3. Step 3: Cross multiply
    353,075.09x = 487,314.36 × 209,807.42
  4. Step 4: Simplify right side
    353,075.09x = 102,242,166,163.98
  5. Step 5: Solve for x
    x = 102,242,166,163.98/353,075.09
  6. Step 6: Final answer
    x = 289,576.27

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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.