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Finding the Fourth Proportional to 290,551.92, 436,560.84 and 278,742.64

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Solution

The fourth proportional to 290,551.92, 436,560.84 and 278,742.64 is: 418,817.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,551.92 : 436,560.84 = 278,742.64 : x
  2. Step 2: Convert to fraction form
    290,551.92/436,560.84 = 278,742.64/x
  3. Step 3: Cross multiply
    290,551.92x = 436,560.84 × 278,742.64
  4. Step 4: Simplify right side
    290,551.92x = 121,688,121,062.22
  5. Step 5: Solve for x
    x = 121,688,121,062.22/290,551.92
  6. Step 6: Final answer
    x = 418,817.13

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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.