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Finding the Fourth Proportional to 1,084.18, 1,495.48 and 664.30

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Solution

The fourth proportional to 1,084.18, 1,495.48 and 664.30 is: 916.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.18 : 1,495.48 = 664.30 : x
  2. Step 2: Convert to fraction form
    1,084.18/1,495.48 = 664.30/x
  3. Step 3: Cross multiply
    1,084.18x = 1,495.48 × 664.30
  4. Step 4: Simplify right side
    1,084.18x = 993,447.36
  5. Step 5: Solve for x
    x = 993,447.36/1,084.18
  6. Step 6: Final answer
    x = 916.31

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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.