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Finding the Fourth Proportional to 656,682.39, 906,182.64 and 381,018.96

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Solution

The fourth proportional to 656,682.39, 906,182.64 and 381,018.96 is: 525,783.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,682.39 : 906,182.64 = 381,018.96 : x
  2. Step 2: Convert to fraction form
    656,682.39/906,182.64 = 381,018.96/x
  3. Step 3: Cross multiply
    656,682.39x = 906,182.64 × 381,018.96
  4. Step 4: Simplify right side
    656,682.39x = 345,272,767,062.85
  5. Step 5: Solve for x
    x = 345,272,767,062.85/656,682.39
  6. Step 6: Final answer
    x = 525,783.50

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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.