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Finding the Fourth Proportional to 656,659.89, 906,190.65 and 354,853.89

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Solution

The fourth proportional to 656,659.89, 906,190.65 and 354,853.89 is: 489,698.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,659.89 : 906,190.65 = 354,853.89 : x
  2. Step 2: Convert to fraction form
    656,659.89/906,190.65 = 354,853.89/x
  3. Step 3: Cross multiply
    656,659.89x = 906,190.65 × 354,853.89
  4. Step 4: Simplify right side
    656,659.89x = 321,565,277,234.13
  5. Step 5: Solve for x
    x = 321,565,277,234.13/656,659.89
  6. Step 6: Final answer
    x = 489,698.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.