Home / 1,356.45-2,034.65-431.83

Finding the Fourth Proportional to 1,356.45, 2,034.65 and 431.83

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Solution

The fourth proportional to 1,356.45, 2,034.65 and 431.83 is: 647.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.45 : 2,034.65 = 431.83 : x
  2. Step 2: Convert to fraction form
    1,356.45/2,034.65 = 431.83/x
  3. Step 3: Cross multiply
    1,356.45x = 2,034.65 × 431.83
  4. Step 4: Simplify right side
    1,356.45x = 878,626.53
  5. Step 5: Solve for x
    x = 878,626.53/1,356.45
  6. Step 6: Final answer
    x = 647.74

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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.