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Finding the Fourth Proportional to 536.12, 802.80 and 445.12

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Solution

The fourth proportional to 536.12, 802.80 and 445.12 is: 666.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.12 : 802.80 = 445.12 : x
  2. Step 2: Convert to fraction form
    536.12/802.80 = 445.12/x
  3. Step 3: Cross multiply
    536.12x = 802.80 × 445.12
  4. Step 4: Simplify right side
    536.12x = 357,342.34
  5. Step 5: Solve for x
    x = 357,342.34/536.12
  6. Step 6: Final answer
    x = 666.53

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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.