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Finding the Fourth Proportional to 679,983.97, 938,372.69 and 374,053.76

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Solution

The fourth proportional to 679,983.97, 938,372.69 and 374,053.76 is: 516,191.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,983.97 : 938,372.69 = 374,053.76 : x
  2. Step 2: Convert to fraction form
    679,983.97/938,372.69 = 374,053.76/x
  3. Step 3: Cross multiply
    679,983.97x = 938,372.69 × 374,053.76
  4. Step 4: Simplify right side
    679,983.97x = 351,001,831,105.55
  5. Step 5: Solve for x
    x = 351,001,831,105.55/679,983.97
  6. Step 6: Final answer
    x = 516,191.34

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Half scale
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Double scale
Find fourth proportional to 679,984.97, 938,374.06 and 374,054.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.