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Finding the Fourth Proportional to 1,085.83, 1,628.38 and 469.15

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Solution

The fourth proportional to 1,085.83, 1,628.38 and 469.15 is: 703.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.83 : 1,628.38 = 469.15 : x
  2. Step 2: Convert to fraction form
    1,085.83/1,628.38 = 469.15/x
  3. Step 3: Cross multiply
    1,085.83x = 1,628.38 × 469.15
  4. Step 4: Simplify right side
    1,085.83x = 763,954.48
  5. Step 5: Solve for x
    x = 763,954.48/1,085.83
  6. Step 6: Final answer
    x = 703.57

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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.