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Finding the Fourth Proportional to 417,999.80, 626,999.70 and 409,705.40

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Solution

The fourth proportional to 417,999.80, 626,999.70 and 409,705.40 is: 614,558.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,999.80 : 626,999.70 = 409,705.40 : x
  2. Step 2: Convert to fraction form
    417,999.80/626,999.70 = 409,705.40/x
  3. Step 3: Cross multiply
    417,999.80x = 626,999.70 × 409,705.40
  4. Step 4: Simplify right side
    417,999.80x = 256,885,162,888.38
  5. Step 5: Solve for x
    x = 256,885,162,888.38/417,999.80
  6. Step 6: Final answer
    x = 614,558.10

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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.