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Finding the Fourth Proportional to 1,440.48, 1,988.80 and 1,048.48

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Solution

The fourth proportional to 1,440.48, 1,988.80 and 1,048.48 is: 1,447.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.48 : 1,988.80 = 1,048.48 : x
  2. Step 2: Convert to fraction form
    1,440.48/1,988.80 = 1,048.48/x
  3. Step 3: Cross multiply
    1,440.48x = 1,988.80 × 1,048.48
  4. Step 4: Simplify right side
    1,440.48x = 2,085,217.02
  5. Step 5: Solve for x
    x = 2,085,217.02/1,440.48
  6. Step 6: Final answer
    x = 1,447.58

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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.