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Finding the Fourth Proportional to 3,418.63, 5,127.79 and 953.40

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Solution

The fourth proportional to 3,418.63, 5,127.79 and 953.40 is: 1,430.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.63 : 5,127.79 = 953.40 : x
  2. Step 2: Convert to fraction form
    3,418.63/5,127.79 = 953.40/x
  3. Step 3: Cross multiply
    3,418.63x = 5,127.79 × 953.40
  4. Step 4: Simplify right side
    3,418.63x = 4,888,834.99
  5. Step 5: Solve for x
    x = 4,888,834.99/3,418.63
  6. Step 6: Final answer
    x = 1,430.06

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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.