Home / 1,913.85-2,639.05-1,470.78

Finding the Fourth Proportional to 1,913.85, 2,639.05 and 1,470.78

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Solution

The fourth proportional to 1,913.85, 2,639.05 and 1,470.78 is: 2,028.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.85 : 2,639.05 = 1,470.78 : x
  2. Step 2: Convert to fraction form
    1,913.85/2,639.05 = 1,470.78/x
  3. Step 3: Cross multiply
    1,913.85x = 2,639.05 × 1,470.78
  4. Step 4: Simplify right side
    1,913.85x = 3,881,458.28
  5. Step 5: Solve for x
    x = 3,881,458.28/1,913.85
  6. Step 6: Final answer
    x = 2,028.09

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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.