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Finding the Fourth Proportional to 407,990.82, 607,885.60 and 385,071.97

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Solution

The fourth proportional to 407,990.82, 607,885.60 and 385,071.97 is: 573,737.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,990.82 : 607,885.60 = 385,071.97 : x
  2. Step 2: Convert to fraction form
    407,990.82/607,885.60 = 385,071.97/x
  3. Step 3: Cross multiply
    407,990.82x = 607,885.60 × 385,071.97
  4. Step 4: Simplify right side
    407,990.82x = 234,079,703,601.27
  5. Step 5: Solve for x
    x = 234,079,703,601.27/407,990.82
  6. Step 6: Final answer
    x = 573,737.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.