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Finding the Fourth Proportional to 581.80, 802.86 and 319.81

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Solution

The fourth proportional to 581.80, 802.86 and 319.81 is: 441.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.80 : 802.86 = 319.81 : x
  2. Step 2: Convert to fraction form
    581.80/802.86 = 319.81/x
  3. Step 3: Cross multiply
    581.80x = 802.86 × 319.81
  4. Step 4: Simplify right side
    581.80x = 256,762.66
  5. Step 5: Solve for x
    x = 256,762.66/581.80
  6. Step 6: Final answer
    x = 441.32

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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.