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Finding the Fourth Proportional to 685,051.20, 961,171.20 and 685,051.20

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Solution

The fourth proportional to 685,051.20, 961,171.20 and 685,051.20 is: 961,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,051.20 : 961,171.20 = 685,051.20 : x
  2. Step 2: Convert to fraction form
    685,051.20/961,171.20 = 685,051.20/x
  3. Step 3: Cross multiply
    685,051.20x = 961,171.20 × 685,051.20
  4. Step 4: Simplify right side
    685,051.20x = 658,451,483,965.44
  5. Step 5: Solve for x
    x = 658,451,483,965.44/685,051.20
  6. Step 6: Final answer
    x = 961,171.20

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.