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Finding the Fourth Proportional to 676,641.74, 1,014,644.75 and 392,413.05

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Solution

The fourth proportional to 676,641.74, 1,014,644.75 and 392,413.05 is: 588,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,641.74 : 1,014,644.75 = 392,413.05 : x
  2. Step 2: Convert to fraction form
    676,641.74/1,014,644.75 = 392,413.05/x
  3. Step 3: Cross multiply
    676,641.74x = 1,014,644.75 × 392,413.05
  4. Step 4: Simplify right side
    676,641.74x = 398,159,839,051.92
  5. Step 5: Solve for x
    x = 398,159,839,051.92/676,641.74
  6. Step 6: Final answer
    x = 588,435.24

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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.