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Finding the Fourth Proportional to 3,907.32, 5,860.77 and 985.46

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Solution

The fourth proportional to 3,907.32, 5,860.77 and 985.46 is: 1,478.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.32 : 5,860.77 = 985.46 : x
  2. Step 2: Convert to fraction form
    3,907.32/5,860.77 = 985.46/x
  3. Step 3: Cross multiply
    3,907.32x = 5,860.77 × 985.46
  4. Step 4: Simplify right side
    3,907.32x = 5,775,525.10
  5. Step 5: Solve for x
    x = 5,775,525.10/3,907.32
  6. Step 6: Final answer
    x = 1,478.13

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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.