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Finding the Fourth Proportional to 420,349.62, 580,095.25 and 239,087.62

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Solution

The fourth proportional to 420,349.62, 580,095.25 and 239,087.62 is: 329,948.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,349.62 : 580,095.25 = 239,087.62 : x
  2. Step 2: Convert to fraction form
    420,349.62/580,095.25 = 239,087.62/x
  3. Step 3: Cross multiply
    420,349.62x = 580,095.25 × 239,087.62
  4. Step 4: Simplify right side
    420,349.62x = 138,693,590,905.04
  5. Step 5: Solve for x
    x = 138,693,590,905.04/420,349.62
  6. Step 6: Final answer
    x = 329,948.18

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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.