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Finding the Fourth Proportional to 420,969.66, 580,964.94 and 239,697.42

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Solution

The fourth proportional to 420,969.66, 580,964.94 and 239,697.42 is: 330,797.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,969.66 : 580,964.94 = 239,697.42 : x
  2. Step 2: Convert to fraction form
    420,969.66/580,964.94 = 239,697.42/x
  3. Step 3: Cross multiply
    420,969.66x = 580,964.94 × 239,697.42
  4. Step 4: Simplify right side
    420,969.66x = 139,255,797,228.46
  5. Step 5: Solve for x
    x = 139,255,797,228.46/420,969.66
  6. Step 6: Final answer
    x = 330,797.70

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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.