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Finding the Fourth Proportional to 289,371.80, 433,911.90 and 171,079.40

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Solution

The fourth proportional to 289,371.80, 433,911.90 and 171,079.40 is: 256,532.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,371.80 : 433,911.90 = 171,079.40 : x
  2. Step 2: Convert to fraction form
    289,371.80/433,911.90 = 171,079.40/x
  3. Step 3: Cross multiply
    289,371.80x = 433,911.90 × 171,079.40
  4. Step 4: Simplify right side
    289,371.80x = 74,233,387,504.86
  5. Step 5: Solve for x
    x = 74,233,387,504.86/289,371.80
  6. Step 6: Final answer
    x = 256,532.90

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1.5x scale

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.