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Finding the Fourth Proportional to 420,570.68, 580,367.30 and 239,265.54

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Solution

The fourth proportional to 420,570.68, 580,367.30 and 239,265.54 is: 330,174.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,570.68 : 580,367.30 = 239,265.54 : x
  2. Step 2: Convert to fraction form
    420,570.68/580,367.30 = 239,265.54/x
  3. Step 3: Cross multiply
    420,570.68x = 580,367.30 × 239,265.54
  4. Step 4: Simplify right side
    420,570.68x = 138,861,894,236.51
  5. Step 5: Solve for x
    x = 138,861,894,236.51/420,570.68
  6. Step 6: Final answer
    x = 330,174.93

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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.