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Finding the Fourth Proportional to 281,332.30, 388,238.58 and 154,007.89

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Solution

The fourth proportional to 281,332.30, 388,238.58 and 154,007.89 is: 212,530.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,332.30 : 388,238.58 = 154,007.89 : x
  2. Step 2: Convert to fraction form
    281,332.30/388,238.58 = 154,007.89/x
  3. Step 3: Cross multiply
    281,332.30x = 388,238.58 × 154,007.89
  4. Step 4: Simplify right side
    281,332.30x = 59,791,805,523.59
  5. Step 5: Solve for x
    x = 59,791,805,523.59/281,332.30
  6. Step 6: Final answer
    x = 212,530.89

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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.