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Finding the Fourth Proportional to 1,059.06, 1,459.95 and 685.92

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Solution

The fourth proportional to 1,059.06, 1,459.95 and 685.92 is: 945.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.06 : 1,459.95 = 685.92 : x
  2. Step 2: Convert to fraction form
    1,059.06/1,459.95 = 685.92/x
  3. Step 3: Cross multiply
    1,059.06x = 1,459.95 × 685.92
  4. Step 4: Simplify right side
    1,059.06x = 1,001,408.90
  5. Step 5: Solve for x
    x = 1,001,408.90/1,059.06
  6. Step 6: Final answer
    x = 945.56

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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.