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Finding the Fourth Proportional to 310,052.58, 427,919.40 and 189,264.30

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Solution

The fourth proportional to 310,052.58, 427,919.40 and 189,264.30 is: 261,213.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,052.58 : 427,919.40 = 189,264.30 : x
  2. Step 2: Convert to fraction form
    310,052.58/427,919.40 = 189,264.30/x
  3. Step 3: Cross multiply
    310,052.58x = 427,919.40 × 189,264.30
  4. Step 4: Simplify right side
    310,052.58x = 80,989,865,697.42
  5. Step 5: Solve for x
    x = 80,989,865,697.42/310,052.58
  6. Step 6: Final answer
    x = 261,213.33

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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.