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Finding the Fourth Proportional to 654,499.80, 981,749.70 and 486,538.20

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Solution

The fourth proportional to 654,499.80, 981,749.70 and 486,538.20 is: 729,807.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,499.80 : 981,749.70 = 486,538.20 : x
  2. Step 2: Convert to fraction form
    654,499.80/981,749.70 = 486,538.20/x
  3. Step 3: Cross multiply
    654,499.80x = 981,749.70 × 486,538.20
  4. Step 4: Simplify right side
    654,499.80x = 477,658,731,888.54
  5. Step 5: Solve for x
    x = 477,658,731,888.54/654,499.80
  6. Step 6: Final answer
    x = 729,807.30

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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.