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Finding the Fourth Proportional to 1,057.06, 1,585.56 and 277.05

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Solution

The fourth proportional to 1,057.06, 1,585.56 and 277.05 is: 415.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.06 : 1,585.56 = 277.05 : x
  2. Step 2: Convert to fraction form
    1,057.06/1,585.56 = 277.05/x
  3. Step 3: Cross multiply
    1,057.06x = 1,585.56 × 277.05
  4. Step 4: Simplify right side
    1,057.06x = 439,279.40
  5. Step 5: Solve for x
    x = 439,279.40/1,057.06
  6. Step 6: Final answer
    x = 415.57

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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.