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Finding the Fourth Proportional to 385,657.20, 578,485.80 and 379,096.20

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Solution

The fourth proportional to 385,657.20, 578,485.80 and 379,096.20 is: 568,644.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,657.20 : 578,485.80 = 379,096.20 : x
  2. Step 2: Convert to fraction form
    385,657.20/578,485.80 = 379,096.20/x
  3. Step 3: Cross multiply
    385,657.20x = 578,485.80 × 379,096.20
  4. Step 4: Simplify right side
    385,657.20x = 219,301,768,533.96
  5. Step 5: Solve for x
    x = 219,301,768,533.96/385,657.20
  6. Step 6: Final answer
    x = 568,644.30

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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.