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Finding the Fourth Proportional to 619.88, 928.08 and 424.46

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Solution

The fourth proportional to 619.88, 928.08 and 424.46 is: 635.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.88 : 928.08 = 424.46 : x
  2. Step 2: Convert to fraction form
    619.88/928.08 = 424.46/x
  3. Step 3: Cross multiply
    619.88x = 928.08 × 424.46
  4. Step 4: Simplify right side
    619.88x = 393,928.20
  5. Step 5: Solve for x
    x = 393,928.20/619.88
  6. Step 6: Final answer
    x = 635.50

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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.