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Finding the Fourth Proportional to 581.67, 802.72 and 319.69

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Solution

The fourth proportional to 581.67, 802.72 and 319.69 is: 441.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.67 : 802.72 = 319.69 : x
  2. Step 2: Convert to fraction form
    581.67/802.72 = 319.69/x
  3. Step 3: Cross multiply
    581.67x = 802.72 × 319.69
  4. Step 4: Simplify right side
    581.67x = 256,621.56
  5. Step 5: Solve for x
    x = 256,621.56/581.67
  6. Step 6: Final answer
    x = 441.18

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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.