Home / 443,011.20-664,516.80-285,417.60

Finding the Fourth Proportional to 443,011.20, 664,516.80 and 285,417.60

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Solution

The fourth proportional to 443,011.20, 664,516.80 and 285,417.60 is: 428,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,011.20 : 664,516.80 = 285,417.60 : x
  2. Step 2: Convert to fraction form
    443,011.20/664,516.80 = 285,417.60/x
  3. Step 3: Cross multiply
    443,011.20x = 664,516.80 × 285,417.60
  4. Step 4: Simplify right side
    443,011.20x = 189,664,790,215.68
  5. Step 5: Solve for x
    x = 189,664,790,215.68/443,011.20
  6. Step 6: Final answer
    x = 428,126.40

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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.