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Finding the Fourth Proportional to 1,376.62, 2,065.13 and 402.60

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Solution

The fourth proportional to 1,376.62, 2,065.13 and 402.60 is: 603.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.62 : 2,065.13 = 402.60 : x
  2. Step 2: Convert to fraction form
    1,376.62/2,065.13 = 402.60/x
  3. Step 3: Cross multiply
    1,376.62x = 2,065.13 × 402.60
  4. Step 4: Simplify right side
    1,376.62x = 831,421.34
  5. Step 5: Solve for x
    x = 831,421.34/1,376.62
  6. Step 6: Final answer
    x = 603.96

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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.