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Finding the Fourth Proportional to 582.30, 802.70 and 385.48

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Solution

The fourth proportional to 582.30, 802.70 and 385.48 is: 531.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.30 : 802.70 = 385.48 : x
  2. Step 2: Convert to fraction form
    582.30/802.70 = 385.48/x
  3. Step 3: Cross multiply
    582.30x = 802.70 × 385.48
  4. Step 4: Simplify right side
    582.30x = 309,424.80
  5. Step 5: Solve for x
    x = 309,424.80/582.30
  6. Step 6: Final answer
    x = 531.38

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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.