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Finding the Fourth Proportional to 281,805.84, 388,885.80 and 154,478.64

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Solution

The fourth proportional to 281,805.84, 388,885.80 and 154,478.64 is: 213,177.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,805.84 : 388,885.80 = 154,478.64 : x
  2. Step 2: Convert to fraction form
    281,805.84/388,885.80 = 154,478.64/x
  3. Step 3: Cross multiply
    281,805.84x = 388,885.80 × 154,478.64
  4. Step 4: Simplify right side
    281,805.84x = 60,074,549,499.31
  5. Step 5: Solve for x
    x = 60,074,549,499.31/281,805.84
  6. Step 6: Final answer
    x = 213,177.09

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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.