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Finding the Fourth Proportional to 280,757.78, 421,180.40 and 168,411.59

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Solution

The fourth proportional to 280,757.78, 421,180.40 and 168,411.59 is: 252,643.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,757.78 : 421,180.40 = 168,411.59 : x
  2. Step 2: Convert to fraction form
    280,757.78/421,180.40 = 168,411.59/x
  3. Step 3: Cross multiply
    280,757.78x = 421,180.40 × 168,411.59
  4. Step 4: Simplify right side
    280,757.78x = 70,931,657,892.88
  5. Step 5: Solve for x
    x = 70,931,657,892.88/280,757.78
  6. Step 6: Final answer
    x = 252,643.61

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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.