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Finding the Fourth Proportional to 289,570.80, 434,356.20 and 279,073.20

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Solution

The fourth proportional to 289,570.80, 434,356.20 and 279,073.20 is: 418,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,570.80 : 434,356.20 = 279,073.20 : x
  2. Step 2: Convert to fraction form
    289,570.80/434,356.20 = 279,073.20/x
  3. Step 3: Cross multiply
    289,570.80x = 434,356.20 × 279,073.20
  4. Step 4: Simplify right side
    289,570.80x = 121,217,174,673.84
  5. Step 5: Solve for x
    x = 121,217,174,673.84/289,570.80
  6. Step 6: Final answer
    x = 418,609.80

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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.