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Finding the Fourth Proportional to 261,992.40, 392,405.40 and 227,000.40

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Solution

The fourth proportional to 261,992.40, 392,405.40 and 227,000.40 is: 339,995.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,992.40 : 392,405.40 = 227,000.40 : x
  2. Step 2: Convert to fraction form
    261,992.40/392,405.40 = 227,000.40/x
  3. Step 3: Cross multiply
    261,992.40x = 392,405.40 × 227,000.40
  4. Step 4: Simplify right side
    261,992.40x = 89,076,182,762.16
  5. Step 5: Solve for x
    x = 89,076,182,762.16/261,992.40
  6. Step 6: Final answer
    x = 339,995.29

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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.