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Finding the Fourth Proportional to 619,012.80, 864,846.45 and 619,012.80

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Solution

The fourth proportional to 619,012.80, 864,846.45 and 619,012.80 is: 864,846.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,012.80 : 864,846.45 = 619,012.80 : x
  2. Step 2: Convert to fraction form
    619,012.80/864,846.45 = 619,012.80/x
  3. Step 3: Cross multiply
    619,012.80x = 864,846.45 × 619,012.80
  4. Step 4: Simplify right side
    619,012.80x = 535,351,022,584.56
  5. Step 5: Solve for x
    x = 535,351,022,584.56/619,012.80
  6. Step 6: Final answer
    x = 864,846.45

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Double scale
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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.