Home / 928,047.40-1,390,947.90-394,448.20

Finding the Fourth Proportional to 928,047.40, 1,390,947.90 and 394,448.20

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Solution

The fourth proportional to 928,047.40, 1,390,947.90 and 394,448.20 is: 591,194.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,047.40 : 1,390,947.90 = 394,448.20 : x
  2. Step 2: Convert to fraction form
    928,047.40/1,390,947.90 = 394,448.20/x
  3. Step 3: Cross multiply
    928,047.40x = 1,390,947.90 × 394,448.20
  4. Step 4: Simplify right side
    928,047.40x = 548,656,895,448.78
  5. Step 5: Solve for x
    x = 548,656,895,448.78/928,047.40
  6. Step 6: Final answer
    x = 591,194.91

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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.