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Finding the Fourth Proportional to 657,010.80, 985,516.20 and 515,293.20

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Solution

The fourth proportional to 657,010.80, 985,516.20 and 515,293.20 is: 772,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,010.80 : 985,516.20 = 515,293.20 : x
  2. Step 2: Convert to fraction form
    657,010.80/985,516.20 = 515,293.20/x
  3. Step 3: Cross multiply
    657,010.80x = 985,516.20 × 515,293.20
  4. Step 4: Simplify right side
    657,010.80x = 507,829,796,349.84
  5. Step 5: Solve for x
    x = 507,829,796,349.84/657,010.80
  6. Step 6: Final answer
    x = 772,939.80

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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.