Home / 578,697.20-868,045.80-485,385.20

Finding the Fourth Proportional to 578,697.20, 868,045.80 and 485,385.20

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Solution

The fourth proportional to 578,697.20, 868,045.80 and 485,385.20 is: 728,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,697.20 : 868,045.80 = 485,385.20 : x
  2. Step 2: Convert to fraction form
    578,697.20/868,045.80 = 485,385.20/x
  3. Step 3: Cross multiply
    578,697.20x = 868,045.80 × 485,385.20
  4. Step 4: Simplify right side
    578,697.20x = 421,336,584,242.16
  5. Step 5: Solve for x
    x = 421,336,584,242.16/578,697.20
  6. Step 6: Final answer
    x = 728,077.80

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Double scale
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Similar ratio
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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.