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Finding the Fourth Proportional to 303,156, 418,355.28 and 169,020

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Solution

The fourth proportional to 303,156, 418,355.28 and 169,020 is: 233,247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,156 : 418,355.28 = 169,020 : x
  2. Step 2: Convert to fraction form
    303,156/418,355.28 = 169,020/x
  3. Step 3: Cross multiply
    303,156x = 418,355.28 × 169,020
  4. Step 4: Simplify right side
    303,156x = 70,710,409,425.60
  5. Step 5: Solve for x
    x = 70,710,409,425.60/303,156
  6. Step 6: Final answer
    x = 233,247.60

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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.