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Finding the Fourth Proportional to 391,213.80, 548,880.30 and 391,213.80

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Solution

The fourth proportional to 391,213.80, 548,880.30 and 391,213.80 is: 548,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,213.80 : 548,880.30 = 391,213.80 : x
  2. Step 2: Convert to fraction form
    391,213.80/548,880.30 = 391,213.80/x
  3. Step 3: Cross multiply
    391,213.80x = 548,880.30 × 391,213.80
  4. Step 4: Simplify right side
    391,213.80x = 214,729,547,908.14
  5. Step 5: Solve for x
    x = 214,729,547,908.14/391,213.80
  6. Step 6: Final answer
    x = 548,880.30

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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.