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Finding the Fourth Proportional to 3,907.14, 5,860.74 and 985.45

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Solution

The fourth proportional to 3,907.14, 5,860.74 and 985.45 is: 1,478.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.14 : 5,860.74 = 985.45 : x
  2. Step 2: Convert to fraction form
    3,907.14/5,860.74 = 985.45/x
  3. Step 3: Cross multiply
    3,907.14x = 5,860.74 × 985.45
  4. Step 4: Simplify right side
    3,907.14x = 5,775,436.93
  5. Step 5: Solve for x
    x = 5,775,436.93/3,907.14
  6. Step 6: Final answer
    x = 1,478.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.