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Finding the Fourth Proportional to 619.61, 929.23 and 445.75

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Solution

The fourth proportional to 619.61, 929.23 and 445.75 is: 668.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.61 : 929.23 = 445.75 : x
  2. Step 2: Convert to fraction form
    619.61/929.23 = 445.75/x
  3. Step 3: Cross multiply
    619.61x = 929.23 × 445.75
  4. Step 4: Simplify right side
    619.61x = 414,209.20
  5. Step 5: Solve for x
    x = 414,209.20/619.61
  6. Step 6: Final answer
    x = 668.50

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Similar ratio
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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.