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Finding the Fourth Proportional to 289,809.40, 434,195.70 and 178,871.80

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Solution

The fourth proportional to 289,809.40, 434,195.70 and 178,871.80 is: 267,987.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,809.40 : 434,195.70 = 178,871.80 : x
  2. Step 2: Convert to fraction form
    289,809.40/434,195.70 = 178,871.80/x
  3. Step 3: Cross multiply
    289,809.40x = 434,195.70 × 178,871.80
  4. Step 4: Simplify right side
    289,809.40x = 77,665,366,411.26
  5. Step 5: Solve for x
    x = 77,665,366,411.26/289,809.40
  6. Step 6: Final answer
    x = 267,987.74

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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.