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Finding the Fourth Proportional to 1,370.79, 2,056.28 and 446.09

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Solution

The fourth proportional to 1,370.79, 2,056.28 and 446.09 is: 669.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.79 : 2,056.28 = 446.09 : x
  2. Step 2: Convert to fraction form
    1,370.79/2,056.28 = 446.09/x
  3. Step 3: Cross multiply
    1,370.79x = 2,056.28 × 446.09
  4. Step 4: Simplify right side
    1,370.79x = 917,273.43
  5. Step 5: Solve for x
    x = 917,273.43/1,370.79
  6. Step 6: Final answer
    x = 669.16

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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.