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Finding the Fourth Proportional to 420,066.36, 579,726 and 238,835.16

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Solution

The fourth proportional to 420,066.36, 579,726 and 238,835.16 is: 329,612.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,066.36 : 579,726 = 238,835.16 : x
  2. Step 2: Convert to fraction form
    420,066.36/579,726 = 238,835.16/x
  3. Step 3: Cross multiply
    420,066.36x = 579,726 × 238,835.16
  4. Step 4: Simplify right side
    420,066.36x = 138,458,951,966.16
  5. Step 5: Solve for x
    x = 138,458,951,966.16/420,066.36
  6. Step 6: Final answer
    x = 329,612.09

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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.