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Finding the Fourth Proportional to 1,346.72, 2,019 and 1,270.40

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Solution

The fourth proportional to 1,346.72, 2,019 and 1,270.40 is: 1,904.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.72 : 2,019 = 1,270.40 : x
  2. Step 2: Convert to fraction form
    1,346.72/2,019 = 1,270.40/x
  3. Step 3: Cross multiply
    1,346.72x = 2,019 × 1,270.40
  4. Step 4: Simplify right side
    1,346.72x = 2,564,937.60
  5. Step 5: Solve for x
    x = 2,564,937.60/1,346.72
  6. Step 6: Final answer
    x = 1,904.58

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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.