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Finding the Fourth Proportional to 581.51, 802.07 and 385.29

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Solution

The fourth proportional to 581.51, 802.07 and 385.29 is: 531.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.51 : 802.07 = 385.29 : x
  2. Step 2: Convert to fraction form
    581.51/802.07 = 385.29/x
  3. Step 3: Cross multiply
    581.51x = 802.07 × 385.29
  4. Step 4: Simplify right side
    581.51x = 309,029.55
  5. Step 5: Solve for x
    x = 309,029.55/581.51
  6. Step 6: Final answer
    x = 531.43

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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.