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Finding the Fourth Proportional to 285,504.80, 428,257.20 and 191,501.60

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Solution

The fourth proportional to 285,504.80, 428,257.20 and 191,501.60 is: 287,252.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,504.80 : 428,257.20 = 191,501.60 : x
  2. Step 2: Convert to fraction form
    285,504.80/428,257.20 = 191,501.60/x
  3. Step 3: Cross multiply
    285,504.80x = 428,257.20 × 191,501.60
  4. Step 4: Simplify right side
    285,504.80x = 82,011,939,011.52
  5. Step 5: Solve for x
    x = 82,011,939,011.52/285,504.80
  6. Step 6: Final answer
    x = 287,252.40

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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.