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Finding the Fourth Proportional to 385,219.80, 578,485.80 and 252,687.60

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Solution

The fourth proportional to 385,219.80, 578,485.80 and 252,687.60 is: 379,461.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,219.80 : 578,485.80 = 252,687.60 : x
  2. Step 2: Convert to fraction form
    385,219.80/578,485.80 = 252,687.60/x
  3. Step 3: Cross multiply
    385,219.80x = 578,485.80 × 252,687.60
  4. Step 4: Simplify right side
    385,219.80x = 146,176,188,436.08
  5. Step 5: Solve for x
    x = 146,176,188,436.08/385,219.80
  6. Step 6: Final answer
    x = 379,461.77

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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.