Home / 3,740.40-5,611.20-1,275.50

Finding the Fourth Proportional to 3,740.40, 5,611.20 and 1,275.50

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Solution

The fourth proportional to 3,740.40, 5,611.20 and 1,275.50 is: 1,913.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,740.40 : 5,611.20 = 1,275.50 : x
  2. Step 2: Convert to fraction form
    3,740.40/5,611.20 = 1,275.50/x
  3. Step 3: Cross multiply
    3,740.40x = 5,611.20 × 1,275.50
  4. Step 4: Simplify right side
    3,740.40x = 7,157,085.60
  5. Step 5: Solve for x
    x = 7,157,085.60/3,740.40
  6. Step 6: Final answer
    x = 1,913.45

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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.