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Finding the Fourth Proportional to 420,838.04, 631,258.42 and 105,294.94

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Solution

The fourth proportional to 420,838.04, 631,258.42 and 105,294.94 is: 157,942.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,838.04 : 631,258.42 = 105,294.94 : x
  2. Step 2: Convert to fraction form
    420,838.04/631,258.42 = 105,294.94/x
  3. Step 3: Cross multiply
    420,838.04x = 631,258.42 × 105,294.94
  4. Step 4: Simplify right side
    420,838.04x = 66,468,317,458.39
  5. Step 5: Solve for x
    x = 66,468,317,458.39/420,838.04
  6. Step 6: Final answer
    x = 157,942.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.