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Finding the Fourth Proportional to 512,056.80, 768,085.20 and 179,666.40

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Solution

The fourth proportional to 512,056.80, 768,085.20 and 179,666.40 is: 269,499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,056.80 : 768,085.20 = 179,666.40 : x
  2. Step 2: Convert to fraction form
    512,056.80/768,085.20 = 179,666.40/x
  3. Step 3: Cross multiply
    512,056.80x = 768,085.20 × 179,666.40
  4. Step 4: Simplify right side
    512,056.80x = 137,999,102,777.28
  5. Step 5: Solve for x
    x = 137,999,102,777.28/512,056.80
  6. Step 6: Final answer
    x = 269,499.60

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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.