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Finding the Fourth Proportional to 285,303.60, 427,977.27 and 85,609.44

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Solution

The fourth proportional to 285,303.60, 427,977.27 and 85,609.44 is: 128,420.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,303.60 : 427,977.27 = 85,609.44 : x
  2. Step 2: Convert to fraction form
    285,303.60/427,977.27 = 85,609.44/x
  3. Step 3: Cross multiply
    285,303.60x = 427,977.27 × 85,609.44
  4. Step 4: Simplify right side
    285,303.60x = 36,638,894,417.43
  5. Step 5: Solve for x
    x = 36,638,894,417.43/285,303.60
  6. Step 6: Final answer
    x = 128,420.72

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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.