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Finding the Fourth Proportional to 438,577.80, 657,866.70 and 434,430.60

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Solution

The fourth proportional to 438,577.80, 657,866.70 and 434,430.60 is: 651,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,577.80 : 657,866.70 = 434,430.60 : x
  2. Step 2: Convert to fraction form
    438,577.80/657,866.70 = 434,430.60/x
  3. Step 3: Cross multiply
    438,577.80x = 657,866.70 × 434,430.60
  4. Step 4: Simplify right side
    438,577.80x = 285,797,425,201.02
  5. Step 5: Solve for x
    x = 285,797,425,201.02/438,577.80
  6. Step 6: Final answer
    x = 651,645.90

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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.