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Finding the Fourth Proportional to 581.26, 802.12 and 319.28

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Solution

The fourth proportional to 581.26, 802.12 and 319.28 is: 440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.26 : 802.12 = 319.28 : x
  2. Step 2: Convert to fraction form
    581.26/802.12 = 319.28/x
  3. Step 3: Cross multiply
    581.26x = 802.12 × 319.28
  4. Step 4: Simplify right side
    581.26x = 256,100.87
  5. Step 5: Solve for x
    x = 256,100.87/581.26
  6. Step 6: Final answer
    x = 440.60

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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.