Home / 285,541.20-428,311.80-85,892.40

Finding the Fourth Proportional to 285,541.20, 428,311.80 and 85,892.40

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Solution

The fourth proportional to 285,541.20, 428,311.80 and 85,892.40 is: 128,838.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,541.20 : 428,311.80 = 85,892.40 : x
  2. Step 2: Convert to fraction form
    285,541.20/428,311.80 = 85,892.40/x
  3. Step 3: Cross multiply
    285,541.20x = 428,311.80 × 85,892.40
  4. Step 4: Simplify right side
    285,541.20x = 36,788,728,450.32
  5. Step 5: Solve for x
    x = 36,788,728,450.32/285,541.20
  6. Step 6: Final answer
    x = 128,838.60

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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.