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Finding the Fourth Proportional to 623.36, 934.50 and 485.66

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Solution

The fourth proportional to 623.36, 934.50 and 485.66 is: 728.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.36 : 934.50 = 485.66 : x
  2. Step 2: Convert to fraction form
    623.36/934.50 = 485.66/x
  3. Step 3: Cross multiply
    623.36x = 934.50 × 485.66
  4. Step 4: Simplify right side
    623.36x = 453,849.27
  5. Step 5: Solve for x
    x = 453,849.27/623.36
  6. Step 6: Final answer
    x = 728.07

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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.