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Finding the Fourth Proportional to 289,771.20, 434,851.20 and 171,316.80

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Solution

The fourth proportional to 289,771.20, 434,851.20 and 171,316.80 is: 257,090.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,771.20 : 434,851.20 = 171,316.80 : x
  2. Step 2: Convert to fraction form
    289,771.20/434,851.20 = 171,316.80/x
  3. Step 3: Cross multiply
    289,771.20x = 434,851.20 × 171,316.80
  4. Step 4: Simplify right side
    289,771.20x = 74,497,316,060.16
  5. Step 5: Solve for x
    x = 74,497,316,060.16/289,771.20
  6. Step 6: Final answer
    x = 257,090.13

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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.