Home / 1,490.89-2,057.01-931.92

Finding the Fourth Proportional to 1,490.89, 2,057.01 and 931.92

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Solution

The fourth proportional to 1,490.89, 2,057.01 and 931.92 is: 1,285.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.89 : 2,057.01 = 931.92 : x
  2. Step 2: Convert to fraction form
    1,490.89/2,057.01 = 931.92/x
  3. Step 3: Cross multiply
    1,490.89x = 2,057.01 × 931.92
  4. Step 4: Simplify right side
    1,490.89x = 1,916,972.98
  5. Step 5: Solve for x
    x = 1,916,972.98/1,490.89
  6. Step 6: Final answer
    x = 1,285.79

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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.