Home / 285,531.20-428,296.80-85,882.40

Finding the Fourth Proportional to 285,531.20, 428,296.80 and 85,882.40

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Solution

The fourth proportional to 285,531.20, 428,296.80 and 85,882.40 is: 128,823.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,531.20 : 428,296.80 = 85,882.40 : x
  2. Step 2: Convert to fraction form
    285,531.20/428,296.80 = 85,882.40/x
  3. Step 3: Cross multiply
    285,531.20x = 428,296.80 × 85,882.40
  4. Step 4: Simplify right side
    285,531.20x = 36,783,157,096.32
  5. Step 5: Solve for x
    x = 36,783,157,096.32/285,531.20
  6. Step 6: Final answer
    x = 128,823.60

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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.