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Finding the Fourth Proportional to 420,287.55, 579,996.15 and 229,300.97

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Solution

The fourth proportional to 420,287.55, 579,996.15 and 229,300.97 is: 316,434.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,287.55 : 579,996.15 = 229,300.97 : x
  2. Step 2: Convert to fraction form
    420,287.55/579,996.15 = 229,300.97/x
  3. Step 3: Cross multiply
    420,287.55x = 579,996.15 × 229,300.97
  4. Step 4: Simplify right side
    420,287.55x = 132,993,676,891.29
  5. Step 5: Solve for x
    x = 132,993,676,891.29/420,287.55
  6. Step 6: Final answer
    x = 316,434.97

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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.