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Finding the Fourth Proportional to 347,999.40, 521,999.10 and 198,700.20

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Solution

The fourth proportional to 347,999.40, 521,999.10 and 198,700.20 is: 298,050.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,999.40 : 521,999.10 = 198,700.20 : x
  2. Step 2: Convert to fraction form
    347,999.40/521,999.10 = 198,700.20/x
  3. Step 3: Cross multiply
    347,999.40x = 521,999.10 × 198,700.20
  4. Step 4: Simplify right side
    347,999.40x = 103,721,325,569.82
  5. Step 5: Solve for x
    x = 103,721,325,569.82/347,999.40
  6. Step 6: Final answer
    x = 298,050.30

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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.