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Finding the Fourth Proportional to 581.64, 802.74 and 348.78

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Solution

The fourth proportional to 581.64, 802.74 and 348.78 is: 481.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.64 : 802.74 = 348.78 : x
  2. Step 2: Convert to fraction form
    581.64/802.74 = 348.78/x
  3. Step 3: Cross multiply
    581.64x = 802.74 × 348.78
  4. Step 4: Simplify right side
    581.64x = 279,979.66
  5. Step 5: Solve for x
    x = 279,979.66/581.64
  6. Step 6: Final answer
    x = 481.36

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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.