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Finding the Fourth Proportional to 396,005.80, 555,807.80 and 396,005.80

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Solution

The fourth proportional to 396,005.80, 555,807.80 and 396,005.80 is: 555,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,005.80 : 555,807.80 = 396,005.80 : x
  2. Step 2: Convert to fraction form
    396,005.80/555,807.80 = 396,005.80/x
  3. Step 3: Cross multiply
    396,005.80x = 555,807.80 × 396,005.80
  4. Step 4: Simplify right side
    396,005.80x = 220,103,112,485.24
  5. Step 5: Solve for x
    x = 220,103,112,485.24/396,005.80
  6. Step 6: Final answer
    x = 555,807.80

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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.