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Finding the Fourth Proportional to 659,986.20, 989,979.30 and 450,034.20

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Solution

The fourth proportional to 659,986.20, 989,979.30 and 450,034.20 is: 675,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,986.20 : 989,979.30 = 450,034.20 : x
  2. Step 2: Convert to fraction form
    659,986.20/989,979.30 = 450,034.20/x
  3. Step 3: Cross multiply
    659,986.20x = 989,979.30 × 450,034.20
  4. Step 4: Simplify right side
    659,986.20x = 445,524,542,292.06
  5. Step 5: Solve for x
    x = 445,524,542,292.06/659,986.20
  6. Step 6: Final answer
    x = 675,051.30

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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.