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Finding the Fourth Proportional to 360,045.80, 538,902.30 and 255,069.80

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Solution

The fourth proportional to 360,045.80, 538,902.30 and 255,069.80 is: 381,778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    360,045.80 : 538,902.30 = 255,069.80 : x
  2. Step 2: Convert to fraction form
    360,045.80/538,902.30 = 255,069.80/x
  3. Step 3: Cross multiply
    360,045.80x = 538,902.30 × 255,069.80
  4. Step 4: Simplify right side
    360,045.80x = 137,457,701,880.54
  5. Step 5: Solve for x
    x = 137,457,701,880.54/360,045.80
  6. Step 6: Final answer
    x = 381,778.38

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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.