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Finding the Fourth Proportional to 613,804.38, 920,832.81 and 258,819.42

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Solution

The fourth proportional to 613,804.38, 920,832.81 and 258,819.42 is: 388,282.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,804.38 : 920,832.81 = 258,819.42 : x
  2. Step 2: Convert to fraction form
    613,804.38/920,832.81 = 258,819.42/x
  3. Step 3: Cross multiply
    613,804.38x = 920,832.81 × 258,819.42
  4. Step 4: Simplify right side
    613,804.38x = 238,329,413,801.17
  5. Step 5: Solve for x
    x = 238,329,413,801.17/613,804.38
  6. Step 6: Final answer
    x = 388,282.36

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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.