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Finding the Fourth Proportional to 420,313.82, 580,030.08 and 239,025.72

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Solution

The fourth proportional to 420,313.82, 580,030.08 and 239,025.72 is: 329,853.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,313.82 : 580,030.08 = 239,025.72 : x
  2. Step 2: Convert to fraction form
    420,313.82/580,030.08 = 239,025.72/x
  3. Step 3: Cross multiply
    420,313.82x = 580,030.08 × 239,025.72
  4. Step 4: Simplify right side
    420,313.82x = 138,642,107,493.66
  5. Step 5: Solve for x
    x = 138,642,107,493.66/420,313.82
  6. Step 6: Final answer
    x = 329,853.80

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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.