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Finding the Fourth Proportional to 285,027.36, 427,528.32 and 74,660.64

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Solution

The fourth proportional to 285,027.36, 427,528.32 and 74,660.64 is: 111,987.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,027.36 : 427,528.32 = 74,660.64 : x
  2. Step 2: Convert to fraction form
    285,027.36/427,528.32 = 74,660.64/x
  3. Step 3: Cross multiply
    285,027.36x = 427,528.32 × 74,660.64
  4. Step 4: Simplify right side
    285,027.36x = 31,919,537,989.32
  5. Step 5: Solve for x
    x = 31,919,537,989.32/285,027.36
  6. Step 6: Final answer
    x = 111,987.63

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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.