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Finding the Fourth Proportional to 717,331.39, 989,885.34 and 411,188.25

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Solution

The fourth proportional to 717,331.39, 989,885.34 and 411,188.25 is: 567,421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,331.39 : 989,885.34 = 411,188.25 : x
  2. Step 2: Convert to fraction form
    717,331.39/989,885.34 = 411,188.25/x
  3. Step 3: Cross multiply
    717,331.39x = 989,885.34 × 411,188.25
  4. Step 4: Simplify right side
    717,331.39x = 407,029,220,655.26
  5. Step 5: Solve for x
    x = 407,029,220,655.26/717,331.39
  6. Step 6: Final answer
    x = 567,421.45

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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.