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Finding the Fourth Proportional to 300,288.59, 450,361.80 and 87,000.05

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Solution

The fourth proportional to 300,288.59, 450,361.80 and 87,000.05 is: 130,479.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,288.59 : 450,361.80 = 87,000.05 : x
  2. Step 2: Convert to fraction form
    300,288.59/450,361.80 = 87,000.05/x
  3. Step 3: Cross multiply
    300,288.59x = 450,361.80 × 87,000.05
  4. Step 4: Simplify right side
    300,288.59x = 39,181,499,118.09
  5. Step 5: Solve for x
    x = 39,181,499,118.09/300,288.59
  6. Step 6: Final answer
    x = 130,479.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.