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Finding the Fourth Proportional to 651,859.20, 977,205.60 and 427,327.20

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Solution

The fourth proportional to 651,859.20, 977,205.60 and 427,327.20 is: 640,608.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,859.20 : 977,205.60 = 427,327.20 : x
  2. Step 2: Convert to fraction form
    651,859.20/977,205.60 = 427,327.20/x
  3. Step 3: Cross multiply
    651,859.20x = 977,205.60 × 427,327.20
  4. Step 4: Simplify right side
    651,859.20x = 417,586,532,872.32
  5. Step 5: Solve for x
    x = 417,586,532,872.32/651,859.20
  6. Step 6: Final answer
    x = 640,608.48

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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.