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Finding the Fourth Proportional to 581.19, 802.05 and 319.21

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Solution

The fourth proportional to 581.19, 802.05 and 319.21 is: 440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.19 : 802.05 = 319.21 : x
  2. Step 2: Convert to fraction form
    581.19/802.05 = 319.21/x
  3. Step 3: Cross multiply
    581.19x = 802.05 × 319.21
  4. Step 4: Simplify right side
    581.19x = 256,016.77
  5. Step 5: Solve for x
    x = 256,016.77/581.19
  6. Step 6: Final answer
    x = 440.50

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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.