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Finding the Fourth Proportional to 879,206, 1,213,305 and 476,798

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Solution

The fourth proportional to 879,206, 1,213,305 and 476,798 is: 657,981.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,206 : 1,213,305 = 476,798 : x
  2. Step 2: Convert to fraction form
    879,206/1,213,305 = 476,798/x
  3. Step 3: Cross multiply
    879,206x = 1,213,305 × 476,798
  4. Step 4: Simplify right side
    879,206x = 578,501,397,390
  5. Step 5: Solve for x
    x = 578,501,397,390/879,206
  6. Step 6: Final answer
    x = 657,981.63

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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.