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Finding the Fourth Proportional to 440,999.80, 661,499.70 and 263,415.40

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Solution

The fourth proportional to 440,999.80, 661,499.70 and 263,415.40 is: 395,123.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,999.80 : 661,499.70 = 263,415.40 : x
  2. Step 2: Convert to fraction form
    440,999.80/661,499.70 = 263,415.40/x
  3. Step 3: Cross multiply
    440,999.80x = 661,499.70 × 263,415.40
  4. Step 4: Simplify right side
    440,999.80x = 174,249,208,075.38
  5. Step 5: Solve for x
    x = 174,249,208,075.38/440,999.80
  6. Step 6: Final answer
    x = 395,123.10

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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.