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Finding the Fourth Proportional to 355,075.52, 489,993.12 and 193,928

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Solution

The fourth proportional to 355,075.52, 489,993.12 and 193,928 is: 267,614.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,075.52 : 489,993.12 = 193,928 : x
  2. Step 2: Convert to fraction form
    355,075.52/489,993.12 = 193,928/x
  3. Step 3: Cross multiply
    355,075.52x = 489,993.12 × 193,928
  4. Step 4: Simplify right side
    355,075.52x = 95,023,385,775.36
  5. Step 5: Solve for x
    x = 95,023,385,775.36/355,075.52
  6. Step 6: Final answer
    x = 267,614.58

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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.