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Finding the Fourth Proportional to 280,805.94, 387,512.10 and 153,481.50

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Solution

The fourth proportional to 280,805.94, 387,512.10 and 153,481.50 is: 211,804.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,805.94 : 387,512.10 = 153,481.50 : x
  2. Step 2: Convert to fraction form
    280,805.94/387,512.10 = 153,481.50/x
  3. Step 3: Cross multiply
    280,805.94x = 387,512.10 × 153,481.50
  4. Step 4: Simplify right side
    280,805.94x = 59,475,938,376.15
  5. Step 5: Solve for x
    x = 59,475,938,376.15/280,805.94
  6. Step 6: Final answer
    x = 211,804.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.