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Finding the Fourth Proportional to 707,979.68, 976,056.72 and 685,964.96

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Solution

The fourth proportional to 707,979.68, 976,056.72 and 685,964.96 is: 945,706.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,979.68 : 976,056.72 = 685,964.96 : x
  2. Step 2: Convert to fraction form
    707,979.68/976,056.72 = 685,964.96/x
  3. Step 3: Cross multiply
    707,979.68x = 976,056.72 × 685,964.96
  4. Step 4: Simplify right side
    707,979.68x = 669,540,708,892.53
  5. Step 5: Solve for x
    x = 669,540,708,892.53/707,979.68
  6. Step 6: Final answer
    x = 945,706.11

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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.