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Finding the Fourth Proportional to 281,858.47, 388,968.50 and 154,533.79

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Solution

The fourth proportional to 281,858.47, 388,968.50 and 154,533.79 is: 213,258.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,858.47 : 388,968.50 = 154,533.79 : x
  2. Step 2: Convert to fraction form
    281,858.47/388,968.50 = 154,533.79/x
  3. Step 3: Cross multiply
    281,858.47x = 388,968.50 × 154,533.79
  4. Step 4: Simplify right side
    281,858.47x = 60,108,776,495.62
  5. Step 5: Solve for x
    x = 60,108,776,495.62/281,858.47
  6. Step 6: Final answer
    x = 213,258.72

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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.