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Finding the Fourth Proportional to 707,721.91, 976,683.88 and 401,826.79

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Solution

The fourth proportional to 707,721.91, 976,683.88 and 401,826.79 is: 554,536.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,721.91 : 976,683.88 = 401,826.79 : x
  2. Step 2: Convert to fraction form
    707,721.91/976,683.88 = 401,826.79/x
  3. Step 3: Cross multiply
    707,721.91x = 976,683.88 × 401,826.79
  4. Step 4: Simplify right side
    707,721.91x = 392,457,744,574.44
  5. Step 5: Solve for x
    x = 392,457,744,574.44/707,721.91
  6. Step 6: Final answer
    x = 554,536.66

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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.