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Finding the Fourth Proportional to 261,353.40, 392,030.10 and 161,188.80

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Solution

The fourth proportional to 261,353.40, 392,030.10 and 161,188.80 is: 241,783.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,353.40 : 392,030.10 = 161,188.80 : x
  2. Step 2: Convert to fraction form
    261,353.40/392,030.10 = 161,188.80/x
  3. Step 3: Cross multiply
    261,353.40x = 392,030.10 × 161,188.80
  4. Step 4: Simplify right side
    261,353.40x = 63,190,861,382.88
  5. Step 5: Solve for x
    x = 63,190,861,382.88/261,353.40
  6. Step 6: Final answer
    x = 241,783.20

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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.