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Finding the Fourth Proportional to 639,686.93, 882,772.25 and 349,300.51

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Solution

The fourth proportional to 639,686.93, 882,772.25 and 349,300.51 is: 482,037.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,686.93 : 882,772.25 = 349,300.51 : x
  2. Step 2: Convert to fraction form
    639,686.93/882,772.25 = 349,300.51/x
  3. Step 3: Cross multiply
    639,686.93x = 882,772.25 × 349,300.51
  4. Step 4: Simplify right side
    639,686.93x = 308,352,793,185.41
  5. Step 5: Solve for x
    x = 308,352,793,185.41/639,686.93
  6. Step 6: Final answer
    x = 482,037.04

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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.