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Finding the Fourth Proportional to 659,085.80, 988,628.70 and 322,287.80

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Solution

The fourth proportional to 659,085.80, 988,628.70 and 322,287.80 is: 483,431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,085.80 : 988,628.70 = 322,287.80 : x
  2. Step 2: Convert to fraction form
    659,085.80/988,628.70 = 322,287.80/x
  3. Step 3: Cross multiply
    659,085.80x = 988,628.70 × 322,287.80
  4. Step 4: Simplify right side
    659,085.80x = 318,622,968,739.86
  5. Step 5: Solve for x
    x = 318,622,968,739.86/659,085.80
  6. Step 6: Final answer
    x = 483,431.70

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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.