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Finding the Fourth Proportional to 1,263.93, 1,895.90 and 386.57

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Solution

The fourth proportional to 1,263.93, 1,895.90 and 386.57 is: 579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.93 : 1,895.90 = 386.57 : x
  2. Step 2: Convert to fraction form
    1,263.93/1,895.90 = 386.57/x
  3. Step 3: Cross multiply
    1,263.93x = 1,895.90 × 386.57
  4. Step 4: Simplify right side
    1,263.93x = 732,898.06
  5. Step 5: Solve for x
    x = 732,898.06/1,263.93
  6. Step 6: Final answer
    x = 579.86

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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.