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Finding the Fourth Proportional to 582, 802.80 and 385.44

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Solution

The fourth proportional to 582, 802.80 and 385.44 is: 531.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    582 : 802.80 = 385.44 : x
  2. Step 2: Convert to fraction form
    582/802.80 = 385.44/x
  3. Step 3: Cross multiply
    582x = 802.80 × 385.44
  4. Step 4: Simplify right side
    582x = 309,431.23
  5. Step 5: Solve for x
    x = 309,431.23/582
  6. Step 6: Final answer
    x = 531.67

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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.