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Finding the Fourth Proportional to 661,691.78, 992,003.03 and 256,674.86

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Solution

The fourth proportional to 661,691.78, 992,003.03 and 256,674.86 is: 384,804.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,691.78 : 992,003.03 = 256,674.86 : x
  2. Step 2: Convert to fraction form
    661,691.78/992,003.03 = 256,674.86/x
  3. Step 3: Cross multiply
    661,691.78x = 992,003.03 × 256,674.86
  4. Step 4: Simplify right side
    661,691.78x = 254,622,232,601.44
  5. Step 5: Solve for x
    x = 254,622,232,601.44/661,691.78
  6. Step 6: Final answer
    x = 384,804.89

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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.