Home / 5,265.81-7,265.70-3,140.78

Finding the Fourth Proportional to 5,265.81, 7,265.70 and 3,140.78

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Solution

The fourth proportional to 5,265.81, 7,265.70 and 3,140.78 is: 4,333.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,265.81 : 7,265.70 = 3,140.78 : x
  2. Step 2: Convert to fraction form
    5,265.81/7,265.70 = 3,140.78/x
  3. Step 3: Cross multiply
    5,265.81x = 7,265.70 × 3,140.78
  4. Step 4: Simplify right side
    5,265.81x = 22,819,928.92
  5. Step 5: Solve for x
    x = 22,819,928.92/5,265.81
  6. Step 6: Final answer
    x = 4,333.60

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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.