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Finding the Fourth Proportional to 2,102.88, 2,903.04 and 1,440

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Solution

The fourth proportional to 2,102.88, 2,903.04 and 1,440 is: 1,987.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.88 : 2,903.04 = 1,440 : x
  2. Step 2: Convert to fraction form
    2,102.88/2,903.04 = 1,440/x
  3. Step 3: Cross multiply
    2,102.88x = 2,903.04 × 1,440
  4. Step 4: Simplify right side
    2,102.88x = 4,180,377.60
  5. Step 5: Solve for x
    x = 4,180,377.60/2,102.88
  6. Step 6: Final answer
    x = 1,987.93

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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.