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Finding the Fourth Proportional to 720,507.94, 994,308.34 and 393,830.29

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Solution

The fourth proportional to 720,507.94, 994,308.34 and 393,830.29 is: 543,489.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,507.94 : 994,308.34 = 393,830.29 : x
  2. Step 2: Convert to fraction form
    720,507.94/994,308.34 = 393,830.29/x
  3. Step 3: Cross multiply
    720,507.94x = 994,308.34 × 393,830.29
  4. Step 4: Simplify right side
    720,507.94x = 391,588,741,891.62
  5. Step 5: Solve for x
    x = 391,588,741,891.62/720,507.94
  6. Step 6: Final answer
    x = 543,489.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.