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Finding the Fourth Proportional to 483.43, 722.05 and 418.63

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Solution

The fourth proportional to 483.43, 722.05 and 418.63 is: 625.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.43 : 722.05 = 418.63 : x
  2. Step 2: Convert to fraction form
    483.43/722.05 = 418.63/x
  3. Step 3: Cross multiply
    483.43x = 722.05 × 418.63
  4. Step 4: Simplify right side
    483.43x = 302,271.79
  5. Step 5: Solve for x
    x = 302,271.79/483.43
  6. Step 6: Final answer
    x = 625.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.