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Finding the Fourth Proportional to 2,668.16, 4,002.80 and 913.32

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Solution

The fourth proportional to 2,668.16, 4,002.80 and 913.32 is: 1,370.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.16 : 4,002.80 = 913.32 : x
  2. Step 2: Convert to fraction form
    2,668.16/4,002.80 = 913.32/x
  3. Step 3: Cross multiply
    2,668.16x = 4,002.80 × 913.32
  4. Step 4: Simplify right side
    2,668.16x = 3,655,832.73
  5. Step 5: Solve for x
    x = 3,655,832.73/2,668.16
  6. Step 6: Final answer
    x = 1,370.17

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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.