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Finding the Fourth Proportional to 407,789.80, 572,086.70 and 407,789.80

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Solution

The fourth proportional to 407,789.80, 572,086.70 and 407,789.80 is: 572,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,789.80 : 572,086.70 = 407,789.80 : x
  2. Step 2: Convert to fraction form
    407,789.80/572,086.70 = 407,789.80/x
  3. Step 3: Cross multiply
    407,789.80x = 572,086.70 × 407,789.80
  4. Step 4: Simplify right side
    407,789.80x = 233,291,120,975.66
  5. Step 5: Solve for x
    x = 233,291,120,975.66/407,789.80
  6. Step 6: Final answer
    x = 572,086.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.