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Finding the Fourth Proportional to 420,562.45, 580,368.72 and 239,270.48

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Solution

The fourth proportional to 420,562.45, 580,368.72 and 239,270.48 is: 330,189.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,562.45 : 580,368.72 = 239,270.48 : x
  2. Step 2: Convert to fraction form
    420,562.45/580,368.72 = 239,270.48/x
  3. Step 3: Cross multiply
    420,562.45x = 580,368.72 × 239,270.48
  4. Step 4: Simplify right side
    420,562.45x = 138,865,102,211.39
  5. Step 5: Solve for x
    x = 138,865,102,211.39/420,562.45
  6. Step 6: Final answer
    x = 330,189.02

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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.