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Finding the Fourth Proportional to 684.87, 945.05 and 463.89

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Solution

The fourth proportional to 684.87, 945.05 and 463.89 is: 640.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.87 : 945.05 = 463.89 : x
  2. Step 2: Convert to fraction form
    684.87/945.05 = 463.89/x
  3. Step 3: Cross multiply
    684.87x = 945.05 × 463.89
  4. Step 4: Simplify right side
    684.87x = 438,399.24
  5. Step 5: Solve for x
    x = 438,399.24/684.87
  6. Step 6: Final answer
    x = 640.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.