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Finding the Fourth Proportional to 521,940.51, 720,624.96 and 400,865.49

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Solution

The fourth proportional to 521,940.51, 720,624.96 and 400,865.49 is: 553,460.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,940.51 : 720,624.96 = 400,865.49 : x
  2. Step 2: Convert to fraction form
    521,940.51/720,624.96 = 400,865.49/x
  3. Step 3: Cross multiply
    521,940.51x = 720,624.96 × 400,865.49
  4. Step 4: Simplify right side
    521,940.51x = 288,873,677,696.63
  5. Step 5: Solve for x
    x = 288,873,677,696.63/521,940.51
  6. Step 6: Final answer
    x = 553,460.93

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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.