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Finding the Fourth Proportional to 281,644.17, 388,666.80 and 154,317.03

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Solution

The fourth proportional to 281,644.17, 388,666.80 and 154,317.03 is: 212,956.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,644.17 : 388,666.80 = 154,317.03 : x
  2. Step 2: Convert to fraction form
    281,644.17/388,666.80 = 154,317.03/x
  3. Step 3: Cross multiply
    281,644.17x = 388,666.80 × 154,317.03
  4. Step 4: Simplify right side
    281,644.17x = 59,977,906,235.60
  5. Step 5: Solve for x
    x = 59,977,906,235.60/281,644.17
  6. Step 6: Final answer
    x = 212,956.32

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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.