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Finding the Fourth Proportional to 651,805.80, 977,708.70 and 628,186.20

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Solution

The fourth proportional to 651,805.80, 977,708.70 and 628,186.20 is: 942,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,805.80 : 977,708.70 = 628,186.20 : x
  2. Step 2: Convert to fraction form
    651,805.80/977,708.70 = 628,186.20/x
  3. Step 3: Cross multiply
    651,805.80x = 977,708.70 × 628,186.20
  4. Step 4: Simplify right side
    651,805.80x = 614,183,112,959.94
  5. Step 5: Solve for x
    x = 614,183,112,959.94/651,805.80
  6. Step 6: Final answer
    x = 942,279.30

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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.