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Finding the Fourth Proportional to 1,072.60, 1,480.54 and 630.48

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Solution

The fourth proportional to 1,072.60, 1,480.54 and 630.48 is: 870.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.60 : 1,480.54 = 630.48 : x
  2. Step 2: Convert to fraction form
    1,072.60/1,480.54 = 630.48/x
  3. Step 3: Cross multiply
    1,072.60x = 1,480.54 × 630.48
  4. Step 4: Simplify right side
    1,072.60x = 933,450.86
  5. Step 5: Solve for x
    x = 933,450.86/1,072.60
  6. Step 6: Final answer
    x = 870.27

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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.