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Finding the Fourth Proportional to 508,866.36, 766,957.22 and 438,636.66

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Solution

The fourth proportional to 508,866.36, 766,957.22 and 438,636.66 is: 661,107.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,866.36 : 766,957.22 = 438,636.66 : x
  2. Step 2: Convert to fraction form
    508,866.36/766,957.22 = 438,636.66/x
  3. Step 3: Cross multiply
    508,866.36x = 766,957.22 × 438,636.66
  4. Step 4: Simplify right side
    508,866.36x = 336,415,553,343.69
  5. Step 5: Solve for x
    x = 336,415,553,343.69/508,866.36
  6. Step 6: Final answer
    x = 661,107.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.