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Finding the Fourth Proportional to 626,998.65, 865,263.22 and 340,520.79

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Solution

The fourth proportional to 626,998.65, 865,263.22 and 340,520.79 is: 469,921.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,998.65 : 865,263.22 = 340,520.79 : x
  2. Step 2: Convert to fraction form
    626,998.65/865,263.22 = 340,520.79/x
  3. Step 3: Cross multiply
    626,998.65x = 865,263.22 × 340,520.79
  4. Step 4: Simplify right side
    626,998.65x = 294,640,113,457.33
  5. Step 5: Solve for x
    x = 294,640,113,457.33/626,998.65
  6. Step 6: Final answer
    x = 469,921.45

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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.