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Finding the Fourth Proportional to 280,813.98, 421,260.54 and 91,213.62

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Solution

The fourth proportional to 280,813.98, 421,260.54 and 91,213.62 is: 136,833.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,813.98 : 421,260.54 = 91,213.62 : x
  2. Step 2: Convert to fraction form
    280,813.98/421,260.54 = 91,213.62/x
  3. Step 3: Cross multiply
    280,813.98x = 421,260.54 × 91,213.62
  4. Step 4: Simplify right side
    280,813.98x = 38,424,698,816.55
  5. Step 5: Solve for x
    x = 38,424,698,816.55/280,813.98
  6. Step 6: Final answer
    x = 136,833.28

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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.