Home / 1,125.03-1,686.46-431.17

Finding the Fourth Proportional to 1,125.03, 1,686.46 and 431.17

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Solution

The fourth proportional to 1,125.03, 1,686.46 and 431.17 is: 646.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.03 : 1,686.46 = 431.17 : x
  2. Step 2: Convert to fraction form
    1,125.03/1,686.46 = 431.17/x
  3. Step 3: Cross multiply
    1,125.03x = 1,686.46 × 431.17
  4. Step 4: Simplify right side
    1,125.03x = 727,150.96
  5. Step 5: Solve for x
    x = 727,150.96/1,125.03
  6. Step 6: Final answer
    x = 646.34

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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.