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Finding the Fourth Proportional to 678,842.25, 936,772.01 and 407,060.12

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Solution

The fourth proportional to 678,842.25, 936,772.01 and 407,060.12 is: 561,724.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,842.25 : 936,772.01 = 407,060.12 : x
  2. Step 2: Convert to fraction form
    678,842.25/936,772.01 = 407,060.12/x
  3. Step 3: Cross multiply
    678,842.25x = 936,772.01 × 407,060.12
  4. Step 4: Simplify right side
    678,842.25x = 381,322,522,426.01
  5. Step 5: Solve for x
    x = 381,322,522,426.01/678,842.25
  6. Step 6: Final answer
    x = 561,724.79

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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.