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Finding the Fourth Proportional to 581.18, 802 and 319.19

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Solution

The fourth proportional to 581.18, 802 and 319.19 is: 440.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.18 : 802 = 319.19 : x
  2. Step 2: Convert to fraction form
    581.18/802 = 319.19/x
  3. Step 3: Cross multiply
    581.18x = 802 × 319.19
  4. Step 4: Simplify right side
    581.18x = 255,990.38
  5. Step 5: Solve for x
    x = 255,990.38/581.18
  6. Step 6: Final answer
    x = 440.47

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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.