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Finding the Fourth Proportional to 623.54, 939.69 and 561.92

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Solution

The fourth proportional to 623.54, 939.69 and 561.92 is: 846.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.54 : 939.69 = 561.92 : x
  2. Step 2: Convert to fraction form
    623.54/939.69 = 561.92/x
  3. Step 3: Cross multiply
    623.54x = 939.69 × 561.92
  4. Step 4: Simplify right side
    623.54x = 528,025.91
  5. Step 5: Solve for x
    x = 528,025.91/623.54
  6. Step 6: Final answer
    x = 846.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.