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Finding the Fourth Proportional to 578,214.48, 798,165.45 and 391,988.73

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Solution

The fourth proportional to 578,214.48, 798,165.45 and 391,988.73 is: 541,100.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,214.48 : 798,165.45 = 391,988.73 : x
  2. Step 2: Convert to fraction form
    578,214.48/798,165.45 = 391,988.73/x
  3. Step 3: Cross multiply
    578,214.48x = 798,165.45 × 391,988.73
  4. Step 4: Simplify right side
    578,214.48x = 312,871,861,075.38
  5. Step 5: Solve for x
    x = 312,871,861,075.38/578,214.48
  6. Step 6: Final answer
    x = 541,100.01

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.