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Finding the Fourth Proportional to 973.17, 1,343.28 and 678.54

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Solution

The fourth proportional to 973.17, 1,343.28 and 678.54 is: 936.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.17 : 1,343.28 = 678.54 : x
  2. Step 2: Convert to fraction form
    973.17/1,343.28 = 678.54/x
  3. Step 3: Cross multiply
    973.17x = 1,343.28 × 678.54
  4. Step 4: Simplify right side
    973.17x = 911,469.21
  5. Step 5: Solve for x
    x = 911,469.21/973.17
  6. Step 6: Final answer
    x = 936.60

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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.