Home / 3,913.05-5,870.48-1,280.68

Finding the Fourth Proportional to 3,913.05, 5,870.48 and 1,280.68

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Solution

The fourth proportional to 3,913.05, 5,870.48 and 1,280.68 is: 1,921.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.05 : 5,870.48 = 1,280.68 : x
  2. Step 2: Convert to fraction form
    3,913.05/5,870.48 = 1,280.68/x
  3. Step 3: Cross multiply
    3,913.05x = 5,870.48 × 1,280.68
  4. Step 4: Simplify right side
    3,913.05x = 7,518,206.33
  5. Step 5: Solve for x
    x = 7,518,206.33/3,913.05
  6. Step 6: Final answer
    x = 1,921.32

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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.