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Finding the Fourth Proportional to 1,267.29, 1,898.37 and 992.07

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Solution

The fourth proportional to 1,267.29, 1,898.37 and 992.07 is: 1,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.29 : 1,898.37 = 992.07 : x
  2. Step 2: Convert to fraction form
    1,267.29/1,898.37 = 992.07/x
  3. Step 3: Cross multiply
    1,267.29x = 1,898.37 × 992.07
  4. Step 4: Simplify right side
    1,267.29x = 1,883,315.93
  5. Step 5: Solve for x
    x = 1,883,315.93/1,267.29
  6. Step 6: Final answer
    x = 1,486.10

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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.