Home / 721,285.56-1,082,268.54-321,890.76

Finding the Fourth Proportional to 721,285.56, 1,082,268.54 and 321,890.76

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Solution

The fourth proportional to 721,285.56, 1,082,268.54 and 321,890.76 is: 482,987.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,285.56 : 1,082,268.54 = 321,890.76 : x
  2. Step 2: Convert to fraction form
    721,285.56/1,082,268.54 = 321,890.76/x
  3. Step 3: Cross multiply
    721,285.56x = 1,082,268.54 × 321,890.76
  4. Step 4: Simplify right side
    721,285.56x = 348,372,242,864.69
  5. Step 5: Solve for x
    x = 348,372,242,864.69/721,285.56
  6. Step 6: Final answer
    x = 482,987.96

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1.5x scale

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.