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Finding the Fourth Proportional to 280,855.17, 387,485.51 and 159,910.92

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Solution

The fourth proportional to 280,855.17, 387,485.51 and 159,910.92 is: 220,623.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,855.17 : 387,485.51 = 159,910.92 : x
  2. Step 2: Convert to fraction form
    280,855.17/387,485.51 = 159,910.92/x
  3. Step 3: Cross multiply
    280,855.17x = 387,485.51 × 159,910.92
  4. Step 4: Simplify right side
    280,855.17x = 61,963,163,591.21
  5. Step 5: Solve for x
    x = 61,963,163,591.21/280,855.17
  6. Step 6: Final answer
    x = 220,623.19

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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.