Home / 3,478.57-4,799.21-1,985.45

Finding the Fourth Proportional to 3,478.57, 4,799.21 and 1,985.45

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Solution

The fourth proportional to 3,478.57, 4,799.21 and 1,985.45 is: 2,739.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.57 : 4,799.21 = 1,985.45 : x
  2. Step 2: Convert to fraction form
    3,478.57/4,799.21 = 1,985.45/x
  3. Step 3: Cross multiply
    3,478.57x = 4,799.21 × 1,985.45
  4. Step 4: Simplify right side
    3,478.57x = 9,528,557.57
  5. Step 5: Solve for x
    x = 9,528,557.57/3,478.57
  6. Step 6: Final answer
    x = 2,739.22

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1.5x scale

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.