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Finding the Fourth Proportional to 576,212.70, 864,319.05 and 457,239.90

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Solution

The fourth proportional to 576,212.70, 864,319.05 and 457,239.90 is: 685,859.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,212.70 : 864,319.05 = 457,239.90 : x
  2. Step 2: Convert to fraction form
    576,212.70/864,319.05 = 457,239.90/x
  3. Step 3: Cross multiply
    576,212.70x = 864,319.05 × 457,239.90
  4. Step 4: Simplify right side
    576,212.70x = 395,201,155,990.10
  5. Step 5: Solve for x
    x = 395,201,155,990.10/576,212.70
  6. Step 6: Final answer
    x = 685,859.85

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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.