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Finding the Fourth Proportional to 581.61, 802.59 and 319.61

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Solution

The fourth proportional to 581.61, 802.59 and 319.61 is: 441.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.61 : 802.59 = 319.61 : x
  2. Step 2: Convert to fraction form
    581.61/802.59 = 319.61/x
  3. Step 3: Cross multiply
    581.61x = 802.59 × 319.61
  4. Step 4: Simplify right side
    581.61x = 256,511.78
  5. Step 5: Solve for x
    x = 256,511.78/581.61
  6. Step 6: Final answer
    x = 441.04

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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.