Home / 1,138.04-1,707.38-407.64

Finding the Fourth Proportional to 1,138.04, 1,707.38 and 407.64

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Solution

The fourth proportional to 1,138.04, 1,707.38 and 407.64 is: 611.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.04 : 1,707.38 = 407.64 : x
  2. Step 2: Convert to fraction form
    1,138.04/1,707.38 = 407.64/x
  3. Step 3: Cross multiply
    1,138.04x = 1,707.38 × 407.64
  4. Step 4: Simplify right side
    1,138.04x = 695,996.38
  5. Step 5: Solve for x
    x = 695,996.38/1,138.04
  6. Step 6: Final answer
    x = 611.57

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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.