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Finding the Fourth Proportional to 474,653.20, 711,979.80 and 443,318.80

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Solution

The fourth proportional to 474,653.20, 711,979.80 and 443,318.80 is: 664,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,653.20 : 711,979.80 = 443,318.80 : x
  2. Step 2: Convert to fraction form
    474,653.20/711,979.80 = 443,318.80/x
  3. Step 3: Cross multiply
    474,653.20x = 711,979.80 × 443,318.80
  4. Step 4: Simplify right side
    474,653.20x = 315,634,030,560.24
  5. Step 5: Solve for x
    x = 315,634,030,560.24/474,653.20
  6. Step 6: Final answer
    x = 664,978.20

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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.