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Finding the Fourth Proportional to 522.72, 720.36 and 483.84

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Solution

The fourth proportional to 522.72, 720.36 and 483.84 is: 666.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.72 : 720.36 = 483.84 : x
  2. Step 2: Convert to fraction form
    522.72/720.36 = 483.84/x
  3. Step 3: Cross multiply
    522.72x = 720.36 × 483.84
  4. Step 4: Simplify right side
    522.72x = 348,538.98
  5. Step 5: Solve for x
    x = 348,538.98/522.72
  6. Step 6: Final answer
    x = 666.78

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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.