Home / 548,845.40-821,664.30-391,381.40

Finding the Fourth Proportional to 548,845.40, 821,664.30 and 391,381.40

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Solution

The fourth proportional to 548,845.40, 821,664.30 and 391,381.40 is: 585,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,845.40 : 821,664.30 = 391,381.40 : x
  2. Step 2: Convert to fraction form
    548,845.40/821,664.30 = 391,381.40/x
  3. Step 3: Cross multiply
    548,845.40x = 821,664.30 × 391,381.40
  4. Step 4: Simplify right side
    548,845.40x = 321,584,124,064.02
  5. Step 5: Solve for x
    x = 321,584,124,064.02/548,845.40
  6. Step 6: Final answer
    x = 585,928.43

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1.5x scale

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.