Home / 1,263.70-1,895.55-386.20

Finding the Fourth Proportional to 1,263.70, 1,895.55 and 386.20

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Solution

The fourth proportional to 1,263.70, 1,895.55 and 386.20 is: 579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.70 : 1,895.55 = 386.20 : x
  2. Step 2: Convert to fraction form
    1,263.70/1,895.55 = 386.20/x
  3. Step 3: Cross multiply
    1,263.70x = 1,895.55 × 386.20
  4. Step 4: Simplify right side
    1,263.70x = 732,061.41
  5. Step 5: Solve for x
    x = 732,061.41/1,263.70
  6. Step 6: Final answer
    x = 579.30

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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.