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Finding the Fourth Proportional to 878,668.77, 1,212,820.69 and 511,232.36

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Solution

The fourth proportional to 878,668.77, 1,212,820.69 and 511,232.36 is: 705,650.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,668.77 : 1,212,820.69 = 511,232.36 : x
  2. Step 2: Convert to fraction form
    878,668.77/1,212,820.69 = 511,232.36/x
  3. Step 3: Cross multiply
    878,668.77x = 1,212,820.69 × 511,232.36
  4. Step 4: Simplify right side
    878,668.77x = 620,033,176,263.34
  5. Step 5: Solve for x
    x = 620,033,176,263.34/878,668.77
  6. Step 6: Final answer
    x = 705,650.64

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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.