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Finding the Fourth Proportional to 581.74, 802.78 and 319.75

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Solution

The fourth proportional to 581.74, 802.78 and 319.75 is: 441.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.74 : 802.78 = 319.75 : x
  2. Step 2: Convert to fraction form
    581.74/802.78 = 319.75/x
  3. Step 3: Cross multiply
    581.74x = 802.78 × 319.75
  4. Step 4: Simplify right side
    581.74x = 256,688.91
  5. Step 5: Solve for x
    x = 256,688.91/581.74
  6. Step 6: Final answer
    x = 441.24

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.