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Finding the Fourth Proportional to 420,248.39, 579,940.08 and 238,960.37

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Solution

The fourth proportional to 420,248.39, 579,940.08 and 238,960.37 is: 329,763.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,248.39 : 579,940.08 = 238,960.37 : x
  2. Step 2: Convert to fraction form
    420,248.39/579,940.08 = 238,960.37/x
  3. Step 3: Cross multiply
    420,248.39x = 579,940.08 × 238,960.37
  4. Step 4: Simplify right side
    420,248.39x = 138,582,696,094.63
  5. Step 5: Solve for x
    x = 138,582,696,094.63/420,248.39
  6. Step 6: Final answer
    x = 329,763.78

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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.