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Finding the Fourth Proportional to 802.18, 1,203.17 and 315.57

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Solution

The fourth proportional to 802.18, 1,203.17 and 315.57 is: 473.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.18 : 1,203.17 = 315.57 : x
  2. Step 2: Convert to fraction form
    802.18/1,203.17 = 315.57/x
  3. Step 3: Cross multiply
    802.18x = 1,203.17 × 315.57
  4. Step 4: Simplify right side
    802.18x = 379,684.36
  5. Step 5: Solve for x
    x = 379,684.36/802.18
  6. Step 6: Final answer
    x = 473.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.