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Finding the Fourth Proportional to 1,004.34, 1,384.70 and 741.90

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Solution

The fourth proportional to 1,004.34, 1,384.70 and 741.90 is: 1,022.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.34 : 1,384.70 = 741.90 : x
  2. Step 2: Convert to fraction form
    1,004.34/1,384.70 = 741.90/x
  3. Step 3: Cross multiply
    1,004.34x = 1,384.70 × 741.90
  4. Step 4: Simplify right side
    1,004.34x = 1,027,308.93
  5. Step 5: Solve for x
    x = 1,027,308.93/1,004.34
  6. Step 6: Final answer
    x = 1,022.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.