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Finding the Fourth Proportional to 1,259.61, 1,879.38 and 1,127.49

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Solution

The fourth proportional to 1,259.61, 1,879.38 and 1,127.49 is: 1,682.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.61 : 1,879.38 = 1,127.49 : x
  2. Step 2: Convert to fraction form
    1,259.61/1,879.38 = 1,127.49/x
  3. Step 3: Cross multiply
    1,259.61x = 1,879.38 × 1,127.49
  4. Step 4: Simplify right side
    1,259.61x = 2,118,982.16
  5. Step 5: Solve for x
    x = 2,118,982.16/1,259.61
  6. Step 6: Final answer
    x = 1,682.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.