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Finding the Fourth Proportional to 626,830.21, 865,001.43 and 340,343.74

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Solution

The fourth proportional to 626,830.21, 865,001.43 and 340,343.74 is: 469,661.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,830.21 : 865,001.43 = 340,343.74 : x
  2. Step 2: Convert to fraction form
    626,830.21/865,001.43 = 340,343.74/x
  3. Step 3: Cross multiply
    626,830.21x = 865,001.43 × 340,343.74
  4. Step 4: Simplify right side
    626,830.21x = 294,397,823,067.84
  5. Step 5: Solve for x
    x = 294,397,823,067.84/626,830.21
  6. Step 6: Final answer
    x = 469,661.19

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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.