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Finding the Fourth Proportional to 420,287.79, 580,013.43 and 239,016.27

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Solution

The fourth proportional to 420,287.79, 580,013.43 and 239,016.27 is: 329,851.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,287.79 : 580,013.43 = 239,016.27 : x
  2. Step 2: Convert to fraction form
    420,287.79/580,013.43 = 239,016.27/x
  3. Step 3: Cross multiply
    420,287.79x = 580,013.43 × 239,016.27
  4. Step 4: Simplify right side
    420,287.79x = 138,632,646,588.51
  5. Step 5: Solve for x
    x = 138,632,646,588.51/420,287.79
  6. Step 6: Final answer
    x = 329,851.71

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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.