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Finding the Fourth Proportional to 626,876.64, 865,067.40 and 340,390.80

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Solution

The fourth proportional to 626,876.64, 865,067.40 and 340,390.80 is: 469,727.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,876.64 : 865,067.40 = 340,390.80 : x
  2. Step 2: Convert to fraction form
    626,876.64/865,067.40 = 340,390.80/x
  3. Step 3: Cross multiply
    626,876.64x = 865,067.40 × 340,390.80
  4. Step 4: Simplify right side
    626,876.64x = 294,460,984,339.92
  5. Step 5: Solve for x
    x = 294,460,984,339.92/626,876.64
  6. Step 6: Final answer
    x = 469,727.16

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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.