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Finding the Fourth Proportional to 653.54, 980.88 and 433.55

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Solution

The fourth proportional to 653.54, 980.88 and 433.55 is: 650.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.54 : 980.88 = 433.55 : x
  2. Step 2: Convert to fraction form
    653.54/980.88 = 433.55/x
  3. Step 3: Cross multiply
    653.54x = 980.88 × 433.55
  4. Step 4: Simplify right side
    653.54x = 425,261.35
  5. Step 5: Solve for x
    x = 425,261.35/653.54
  6. Step 6: Final answer
    x = 650.71

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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.