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Finding the Fourth Proportional to 281,642.67, 388,664.73 and 154,315.53

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Solution

The fourth proportional to 281,642.67, 388,664.73 and 154,315.53 is: 212,954.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,642.67 : 388,664.73 = 154,315.53 : x
  2. Step 2: Convert to fraction form
    281,642.67/388,664.73 = 154,315.53/x
  3. Step 3: Cross multiply
    281,642.67x = 388,664.73 × 154,315.53
  4. Step 4: Simplify right side
    281,642.67x = 59,977,003,802.26
  5. Step 5: Solve for x
    x = 59,977,003,802.26/281,642.67
  6. Step 6: Final answer
    x = 212,954.25

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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.