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Finding the Fourth Proportional to 678,842.76, 936,772.70 and 407,060.62

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Solution

The fourth proportional to 678,842.76, 936,772.70 and 407,060.62 is: 561,725.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,842.76 : 936,772.70 = 407,060.62 : x
  2. Step 2: Convert to fraction form
    678,842.76/936,772.70 = 407,060.62/x
  3. Step 3: Cross multiply
    678,842.76x = 936,772.70 × 407,060.62
  4. Step 4: Simplify right side
    678,842.76x = 381,323,274,025.77
  5. Step 5: Solve for x
    x = 381,323,274,025.77/678,842.76
  6. Step 6: Final answer
    x = 561,725.48

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Double scale
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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.