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Finding the Fourth Proportional to 678,794.83, 1,018,413.42 and 323,762.65

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Solution

The fourth proportional to 678,794.83, 1,018,413.42 and 323,762.65 is: 485,749.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,794.83 : 1,018,413.42 = 323,762.65 : x
  2. Step 2: Convert to fraction form
    678,794.83/1,018,413.42 = 323,762.65/x
  3. Step 3: Cross multiply
    678,794.83x = 1,018,413.42 × 323,762.65
  4. Step 4: Simplify right side
    678,794.83x = 329,724,227,654.76
  5. Step 5: Solve for x
    x = 329,724,227,654.76/678,794.83
  6. Step 6: Final answer
    x = 485,749.47

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Double scale
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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.