Home / 1,269.16-1,904.06-1,125.80

Finding the Fourth Proportional to 1,269.16, 1,904.06 and 1,125.80

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Solution

The fourth proportional to 1,269.16, 1,904.06 and 1,125.80 is: 1,688.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.16 : 1,904.06 = 1,125.80 : x
  2. Step 2: Convert to fraction form
    1,269.16/1,904.06 = 1,125.80/x
  3. Step 3: Cross multiply
    1,269.16x = 1,904.06 × 1,125.80
  4. Step 4: Simplify right side
    1,269.16x = 2,143,590.75
  5. Step 5: Solve for x
    x = 2,143,590.75/1,269.16
  6. Step 6: Final answer
    x = 1,688.98

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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.