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Finding the Fourth Proportional to 420,571.17, 580,310.56 and 239,272.51

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Solution

The fourth proportional to 420,571.17, 580,310.56 and 239,272.51 is: 330,151.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,571.17 : 580,310.56 = 239,272.51 : x
  2. Step 2: Convert to fraction form
    420,571.17/580,310.56 = 239,272.51/x
  3. Step 3: Cross multiply
    420,571.17x = 580,310.56 × 239,272.51
  4. Step 4: Simplify right side
    420,571.17x = 138,852,365,295.18
  5. Step 5: Solve for x
    x = 138,852,365,295.18/420,571.17
  6. Step 6: Final answer
    x = 330,151.89

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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.