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Finding the Fourth Proportional to 420,287.18, 579,995.64 and 229,300.58

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Solution

The fourth proportional to 420,287.18, 579,995.64 and 229,300.58 is: 316,434.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,287.18 : 579,995.64 = 229,300.58 : x
  2. Step 2: Convert to fraction form
    420,287.18/579,995.64 = 229,300.58/x
  3. Step 3: Cross multiply
    420,287.18x = 579,995.64 × 229,300.58
  4. Step 4: Simplify right side
    420,287.18x = 132,993,338,099.46
  5. Step 5: Solve for x
    x = 132,993,338,099.46/420,287.18
  6. Step 6: Final answer
    x = 316,434.44

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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.