Home / 1,455.20-2,007.68-931.56

Finding the Fourth Proportional to 1,455.20, 2,007.68 and 931.56

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Solution

The fourth proportional to 1,455.20, 2,007.68 and 931.56 is: 1,285.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.20 : 2,007.68 = 931.56 : x
  2. Step 2: Convert to fraction form
    1,455.20/2,007.68 = 931.56/x
  3. Step 3: Cross multiply
    1,455.20x = 2,007.68 × 931.56
  4. Step 4: Simplify right side
    1,455.20x = 1,870,274.38
  5. Step 5: Solve for x
    x = 1,870,274.38/1,455.20
  6. Step 6: Final answer
    x = 1,285.24

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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.