Home / 285,613.20-428,333.45-85,880.57

Finding the Fourth Proportional to 285,613.20, 428,333.45 and 85,880.57

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Solution

The fourth proportional to 285,613.20, 428,333.45 and 85,880.57 is: 128,794.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,613.20 : 428,333.45 = 85,880.57 : x
  2. Step 2: Convert to fraction form
    285,613.20/428,333.45 = 85,880.57/x
  3. Step 3: Cross multiply
    285,613.20x = 428,333.45 × 85,880.57
  4. Step 4: Simplify right side
    285,613.20x = 36,785,518,265.00
  5. Step 5: Solve for x
    x = 36,785,518,265.00/285,613.20
  6. Step 6: Final answer
    x = 128,794.88

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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.