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Finding the Fourth Proportional to 1,376.36, 2,064.88 and 402.48

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Solution

The fourth proportional to 1,376.36, 2,064.88 and 402.48 is: 603.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.36 : 2,064.88 = 402.48 : x
  2. Step 2: Convert to fraction form
    1,376.36/2,064.88 = 402.48/x
  3. Step 3: Cross multiply
    1,376.36x = 2,064.88 × 402.48
  4. Step 4: Simplify right side
    1,376.36x = 831,072.90
  5. Step 5: Solve for x
    x = 831,072.90/1,376.36
  6. Step 6: Final answer
    x = 603.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.