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Finding the Fourth Proportional to 651,617.20, 977,425.80 and 427,085.20

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Solution

The fourth proportional to 651,617.20, 977,425.80 and 427,085.20 is: 640,627.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,617.20 : 977,425.80 = 427,085.20 : x
  2. Step 2: Convert to fraction form
    651,617.20/977,425.80 = 427,085.20/x
  3. Step 3: Cross multiply
    651,617.20x = 977,425.80 × 427,085.20
  4. Step 4: Simplify right side
    651,617.20x = 417,444,093,278.16
  5. Step 5: Solve for x
    x = 417,444,093,278.16/651,617.20
  6. Step 6: Final answer
    x = 640,627.80

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Half scale
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Double scale
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Similar ratio
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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.