Home / 1,263.75-1,895.66-430.80

Finding the Fourth Proportional to 1,263.75, 1,895.66 and 430.80

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Solution

The fourth proportional to 1,263.75, 1,895.66 and 430.80 is: 646.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.75 : 1,895.66 = 430.80 : x
  2. Step 2: Convert to fraction form
    1,263.75/1,895.66 = 430.80/x
  3. Step 3: Cross multiply
    1,263.75x = 1,895.66 × 430.80
  4. Step 4: Simplify right side
    1,263.75x = 816,650.33
  5. Step 5: Solve for x
    x = 816,650.33/1,263.75
  6. Step 6: Final answer
    x = 646.21

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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.