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Finding the Fourth Proportional to 619,606.80, 930,101.40 and 578,998.80

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Solution

The fourth proportional to 619,606.80, 930,101.40 and 578,998.80 is: 869,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,606.80 : 930,101.40 = 578,998.80 : x
  2. Step 2: Convert to fraction form
    619,606.80/930,101.40 = 578,998.80/x
  3. Step 3: Cross multiply
    619,606.80x = 930,101.40 × 578,998.80
  4. Step 4: Simplify right side
    619,606.80x = 538,527,594,478.32
  5. Step 5: Solve for x
    x = 538,527,594,478.32/619,606.80
  6. Step 6: Final answer
    x = 869,144.10

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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.