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Finding the Fourth Proportional to 446,615.40, 669,923.10 and 147,142.20

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Solution

The fourth proportional to 446,615.40, 669,923.10 and 147,142.20 is: 220,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    446,615.40 : 669,923.10 = 147,142.20 : x
  2. Step 2: Convert to fraction form
    446,615.40/669,923.10 = 147,142.20/x
  3. Step 3: Cross multiply
    446,615.40x = 669,923.10 × 147,142.20
  4. Step 4: Simplify right side
    446,615.40x = 98,573,958,764.82
  5. Step 5: Solve for x
    x = 98,573,958,764.82/446,615.40
  6. Step 6: Final answer
    x = 220,713.30

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Half scale
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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.