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Finding the Fourth Proportional to 656,777.39, 906,352.38 and 354,971.39

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Solution

The fourth proportional to 656,777.39, 906,352.38 and 354,971.39 is: 489,860.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,777.39 : 906,352.38 = 354,971.39 : x
  2. Step 2: Convert to fraction form
    656,777.39/906,352.38 = 354,971.39/x
  3. Step 3: Cross multiply
    656,777.39x = 906,352.38 × 354,971.39
  4. Step 4: Simplify right side
    656,777.39x = 321,729,159,626.65
  5. Step 5: Solve for x
    x = 321,729,159,626.65/656,777.39
  6. Step 6: Final answer
    x = 489,860.29

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1.5x scale

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.