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Finding the Fourth Proportional to 280,803.32, 387,508.50 and 159,955.80

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Solution

The fourth proportional to 280,803.32, 387,508.50 and 159,955.80 is: 220,738.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,803.32 : 387,508.50 = 159,955.80 : x
  2. Step 2: Convert to fraction form
    280,803.32/387,508.50 = 159,955.80/x
  3. Step 3: Cross multiply
    280,803.32x = 387,508.50 × 159,955.80
  4. Step 4: Simplify right side
    280,803.32x = 61,984,232,124.30
  5. Step 5: Solve for x
    x = 61,984,232,124.30/280,803.32
  6. Step 6: Final answer
    x = 220,738.96

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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.