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Finding the Fourth Proportional to 493,427.60, 680,892.09 and 278,588.87

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Solution

The fourth proportional to 493,427.60, 680,892.09 and 278,588.87 is: 384,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,427.60 : 680,892.09 = 278,588.87 : x
  2. Step 2: Convert to fraction form
    493,427.60/680,892.09 = 278,588.87/x
  3. Step 3: Cross multiply
    493,427.60x = 680,892.09 × 278,588.87
  4. Step 4: Simplify right side
    493,427.60x = 189,688,958,602.56
  5. Step 5: Solve for x
    x = 189,688,958,602.56/493,427.60
  6. Step 6: Final answer
    x = 384,431.19

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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.