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Finding the Fourth Proportional to 420,248.89, 579,940.77 and 238,960.87

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Solution

The fourth proportional to 420,248.89, 579,940.77 and 238,960.87 is: 329,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,248.89 : 579,940.77 = 238,960.87 : x
  2. Step 2: Convert to fraction form
    420,248.89/579,940.77 = 238,960.87/x
  3. Step 3: Cross multiply
    420,248.89x = 579,940.77 × 238,960.87
  4. Step 4: Simplify right side
    420,248.89x = 138,583,150,947.67
  5. Step 5: Solve for x
    x = 138,583,150,947.67/420,248.89
  6. Step 6: Final answer
    x = 329,764.47

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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.