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Finding the Fourth Proportional to 501,249.73, 691,660.68 and 286,403.71

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Solution

The fourth proportional to 501,249.73, 691,660.68 and 286,403.71 is: 395,200.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,249.73 : 691,660.68 = 286,403.71 : x
  2. Step 2: Convert to fraction form
    501,249.73/691,660.68 = 286,403.71/x
  3. Step 3: Cross multiply
    501,249.73x = 691,660.68 × 286,403.71
  4. Step 4: Simplify right side
    501,249.73x = 198,094,184,813.12
  5. Step 5: Solve for x
    x = 198,094,184,813.12/501,249.73
  6. Step 6: Final answer
    x = 395,200.58

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Double scale
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Similar ratio
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1.5x scale

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.