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Finding the Fourth Proportional to 623.49, 934.20 and 440.55

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Solution

The fourth proportional to 623.49, 934.20 and 440.55 is: 660.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.49 : 934.20 = 440.55 : x
  2. Step 2: Convert to fraction form
    623.49/934.20 = 440.55/x
  3. Step 3: Cross multiply
    623.49x = 934.20 × 440.55
  4. Step 4: Simplify right side
    623.49x = 411,561.81
  5. Step 5: Solve for x
    x = 411,561.81/623.49
  6. Step 6: Final answer
    x = 660.09

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Double scale
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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.