Home / 285,524.20-428,286.30-85,875.40

Finding the Fourth Proportional to 285,524.20, 428,286.30 and 85,875.40

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Solution

The fourth proportional to 285,524.20, 428,286.30 and 85,875.40 is: 128,813.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,524.20 : 428,286.30 = 85,875.40 : x
  2. Step 2: Convert to fraction form
    285,524.20/428,286.30 = 85,875.40/x
  3. Step 3: Cross multiply
    285,524.20x = 428,286.30 × 85,875.40
  4. Step 4: Simplify right side
    285,524.20x = 36,779,257,327.02
  5. Step 5: Solve for x
    x = 36,779,257,327.02/285,524.20
  6. Step 6: Final answer
    x = 128,813.10

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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.