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Finding the Fourth Proportional to 1,085.79, 1,627.93 and 537.85

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Solution

The fourth proportional to 1,085.79, 1,627.93 and 537.85 is: 806.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.79 : 1,627.93 = 537.85 : x
  2. Step 2: Convert to fraction form
    1,085.79/1,627.93 = 537.85/x
  3. Step 3: Cross multiply
    1,085.79x = 1,627.93 × 537.85
  4. Step 4: Simplify right side
    1,085.79x = 875,582.15
  5. Step 5: Solve for x
    x = 875,582.15/1,085.79
  6. Step 6: Final answer
    x = 806.40

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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.