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Finding the Fourth Proportional to 391,480.80, 548,810.40 and 391,480.80

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Solution

The fourth proportional to 391,480.80, 548,810.40 and 391,480.80 is: 548,810.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,480.80 : 548,810.40 = 391,480.80 : x
  2. Step 2: Convert to fraction form
    391,480.80/548,810.40 = 391,480.80/x
  3. Step 3: Cross multiply
    391,480.80x = 548,810.40 × 391,480.80
  4. Step 4: Simplify right side
    391,480.80x = 214,848,734,440.32
  5. Step 5: Solve for x
    x = 214,848,734,440.32/391,480.80
  6. Step 6: Final answer
    x = 548,810.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.