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Finding the Fourth Proportional to 281,652.80, 388,685.79 and 154,320.80

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Solution

The fourth proportional to 281,652.80, 388,685.79 and 154,320.80 is: 212,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,652.80 : 388,685.79 = 154,320.80 : x
  2. Step 2: Convert to fraction form
    281,652.80/388,685.79 = 154,320.80/x
  3. Step 3: Cross multiply
    281,652.80x = 388,685.79 × 154,320.80
  4. Step 4: Simplify right side
    281,652.80x = 59,982,300,118.00
  5. Step 5: Solve for x
    x = 59,982,300,118.00/281,652.80
  6. Step 6: Final answer
    x = 212,965.40

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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.