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Finding the Fourth Proportional to 456,777.80, 685,166.70 and 220,144.40

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Solution

The fourth proportional to 456,777.80, 685,166.70 and 220,144.40 is: 330,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,777.80 : 685,166.70 = 220,144.40 : x
  2. Step 2: Convert to fraction form
    456,777.80/685,166.70 = 220,144.40/x
  3. Step 3: Cross multiply
    456,777.80x = 685,166.70 × 220,144.40
  4. Step 4: Simplify right side
    456,777.80x = 150,835,612,071.48
  5. Step 5: Solve for x
    x = 150,835,612,071.48/456,777.80
  6. Step 6: Final answer
    x = 330,216.60

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.