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Finding the Fourth Proportional to 581.48, 802.78 and 385.34

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Solution

The fourth proportional to 581.48, 802.78 and 385.34 is: 531.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.48 : 802.78 = 385.34 : x
  2. Step 2: Convert to fraction form
    581.48/802.78 = 385.34/x
  3. Step 3: Cross multiply
    581.48x = 802.78 × 385.34
  4. Step 4: Simplify right side
    581.48x = 309,343.25
  5. Step 5: Solve for x
    x = 309,343.25/581.48
  6. Step 6: Final answer
    x = 531.99

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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.