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Finding the Fourth Proportional to 420,725.88, 631,318.46 and 243,578.88

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Solution

The fourth proportional to 420,725.88, 631,318.46 and 243,578.88 is: 365,501.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,725.88 : 631,318.46 = 243,578.88 : x
  2. Step 2: Convert to fraction form
    420,725.88/631,318.46 = 243,578.88/x
  3. Step 3: Cross multiply
    420,725.88x = 631,318.46 × 243,578.88
  4. Step 4: Simplify right side
    420,725.88x = 153,775,842,192.23
  5. Step 5: Solve for x
    x = 153,775,842,192.23/420,725.88
  6. Step 6: Final answer
    x = 365,501.27

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1.5x scale

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.