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Finding the Fourth Proportional to 656,810, 906,398.88 and 355,004

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Solution

The fourth proportional to 656,810, 906,398.88 and 355,004 is: 489,906.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,810 : 906,398.88 = 355,004 : x
  2. Step 2: Convert to fraction form
    656,810/906,398.88 = 355,004/x
  3. Step 3: Cross multiply
    656,810x = 906,398.88 × 355,004
  4. Step 4: Simplify right side
    656,810x = 321,775,227,995.52
  5. Step 5: Solve for x
    x = 321,775,227,995.52/656,810
  6. Step 6: Final answer
    x = 489,906.10

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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.