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Finding the Fourth Proportional to 1,265.29, 1,898.03 and 340.88

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Solution

The fourth proportional to 1,265.29, 1,898.03 and 340.88 is: 511.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.29 : 1,898.03 = 340.88 : x
  2. Step 2: Convert to fraction form
    1,265.29/1,898.03 = 340.88/x
  3. Step 3: Cross multiply
    1,265.29x = 1,898.03 × 340.88
  4. Step 4: Simplify right side
    1,265.29x = 646,991.83
  5. Step 5: Solve for x
    x = 646,991.83/1,265.29
  6. Step 6: Final answer
    x = 511.34

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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.