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Finding the Fourth Proportional to 425,825.79, 639,181.56 and 313,632.69

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Solution

The fourth proportional to 425,825.79, 639,181.56 and 313,632.69 is: 470,775.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,825.79 : 639,181.56 = 313,632.69 : x
  2. Step 2: Convert to fraction form
    425,825.79/639,181.56 = 313,632.69/x
  3. Step 3: Cross multiply
    425,825.79x = 639,181.56 × 313,632.69
  4. Step 4: Simplify right side
    425,825.79x = 200,468,232,061.20
  5. Step 5: Solve for x
    x = 200,468,232,061.20/425,825.79
  6. Step 6: Final answer
    x = 470,775.22

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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.