Home / 2,618,866.52-3,928,465.81-821,820.90

Finding the Fourth Proportional to 2,618,866.52, 3,928,465.81 and 821,820.90

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Solution

The fourth proportional to 2,618,866.52, 3,928,465.81 and 821,820.90 is: 1,232,783.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618,866.52 : 3,928,465.81 = 821,820.90 : x
  2. Step 2: Convert to fraction form
    2,618,866.52/3,928,465.81 = 821,820.90/x
  3. Step 3: Cross multiply
    2,618,866.52x = 3,928,465.81 × 821,820.90
  4. Step 4: Simplify right side
    2,618,866.52x = 3,228,495,323,352.45
  5. Step 5: Solve for x
    x = 3,228,495,323,352.45/2,618,866.52
  6. Step 6: Final answer
    x = 1,232,783.46

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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.