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Finding the Fourth Proportional to 613,922.88, 921,009.60 and 258,936.48

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Solution

The fourth proportional to 613,922.88, 921,009.60 and 258,936.48 is: 388,457.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,922.88 : 921,009.60 = 258,936.48 : x
  2. Step 2: Convert to fraction form
    613,922.88/921,009.60 = 258,936.48/x
  3. Step 3: Cross multiply
    613,922.88x = 921,009.60 × 258,936.48
  4. Step 4: Simplify right side
    613,922.88x = 238,482,983,870.21
  5. Step 5: Solve for x
    x = 238,482,983,870.21/613,922.88
  6. Step 6: Final answer
    x = 388,457.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.