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Finding the Fourth Proportional to 356,870.31, 492,435.64 and 203,918.41

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Solution

The fourth proportional to 356,870.31, 492,435.64 and 203,918.41 is: 281,381.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,870.31 : 492,435.64 = 203,918.41 : x
  2. Step 2: Convert to fraction form
    356,870.31/492,435.64 = 203,918.41/x
  3. Step 3: Cross multiply
    356,870.31x = 492,435.64 × 203,918.41
  4. Step 4: Simplify right side
    356,870.31x = 100,416,692,459.53
  5. Step 5: Solve for x
    x = 100,416,692,459.53/356,870.31
  6. Step 6: Final answer
    x = 281,381.47

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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.