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Finding the Fourth Proportional to 285,333.50, 427,999.26 and 85,653.08

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Solution

The fourth proportional to 285,333.50, 427,999.26 and 85,653.08 is: 128,479.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,333.50 : 427,999.26 = 85,653.08 : x
  2. Step 2: Convert to fraction form
    285,333.50/427,999.26 = 85,653.08/x
  3. Step 3: Cross multiply
    285,333.50x = 427,999.26 × 85,653.08
  4. Step 4: Simplify right side
    285,333.50x = 36,659,454,856.72
  5. Step 5: Solve for x
    x = 36,659,454,856.72/285,333.50
  6. Step 6: Final answer
    x = 128,479.32

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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.