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Finding the Fourth Proportional to 1,505.53, 2,078.92 and 946.94

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Solution

The fourth proportional to 1,505.53, 2,078.92 and 946.94 is: 1,307.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.53 : 2,078.92 = 946.94 : x
  2. Step 2: Convert to fraction form
    1,505.53/2,078.92 = 946.94/x
  3. Step 3: Cross multiply
    1,505.53x = 2,078.92 × 946.94
  4. Step 4: Simplify right side
    1,505.53x = 1,968,597.97
  5. Step 5: Solve for x
    x = 1,968,597.97/1,505.53
  6. Step 6: Final answer
    x = 1,307.58

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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.