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Finding the Fourth Proportional to 492,860.97, 680,168.75 and 311,507.03

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Solution

The fourth proportional to 492,860.97, 680,168.75 and 311,507.03 is: 429,892.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,860.97 : 680,168.75 = 311,507.03 : x
  2. Step 2: Convert to fraction form
    492,860.97/680,168.75 = 311,507.03/x
  3. Step 3: Cross multiply
    492,860.97x = 680,168.75 × 311,507.03
  4. Step 4: Simplify right side
    492,860.97x = 211,877,347,354.20
  5. Step 5: Solve for x
    x = 211,877,347,354.20/492,860.97
  6. Step 6: Final answer
    x = 429,892.73

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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.