Home / 578,743.40-868,115.10-389,786.60

Finding the Fourth Proportional to 578,743.40, 868,115.10 and 389,786.60

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Solution

The fourth proportional to 578,743.40, 868,115.10 and 389,786.60 is: 584,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,743.40 : 868,115.10 = 389,786.60 : x
  2. Step 2: Convert to fraction form
    578,743.40/868,115.10 = 389,786.60/x
  3. Step 3: Cross multiply
    578,743.40x = 868,115.10 × 389,786.60
  4. Step 4: Simplify right side
    578,743.40x = 338,379,633,237.66
  5. Step 5: Solve for x
    x = 338,379,633,237.66/578,743.40
  6. Step 6: Final answer
    x = 584,679.90

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Half scale
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Double scale
Find fourth proportional to 578,744.40, 868,116.60 and 389,787.60
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.