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Finding the Fourth Proportional to 665,926.62, 918,958.23 and 407,901.66

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Solution

The fourth proportional to 665,926.62, 918,958.23 and 407,901.66 is: 562,891.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,926.62 : 918,958.23 = 407,901.66 : x
  2. Step 2: Convert to fraction form
    665,926.62/918,958.23 = 407,901.66/x
  3. Step 3: Cross multiply
    665,926.62x = 918,958.23 × 407,901.66
  4. Step 4: Simplify right side
    665,926.62x = 374,844,587,487.66
  5. Step 5: Solve for x
    x = 374,844,587,487.66/665,926.62
  6. Step 6: Final answer
    x = 562,891.73

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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.